Volume 08 (1864) (474 pages)

26. The Blining and Srientitie Bvess, Latent Office Department, = Treatine Sutpuates or Corrrr, Copatt anp Nickie to Oxstain tier CuLoriprs.—Heretofore, says the Scientific American, it has been eustomary in the separation of two or more sulphates, to use the difference of temperature or concentration of a solutiou and let it chrystalize : but the sulphates of copper, eobalt and niekle, the separation of which eannot be effected by ehrystalization, nor by the usual mode of separation employed for these metals—have been precipitated by the addition of lime or other reagents, and then dissolved in muriatic or other acid, so as to obtain'those metals as chlorides, ‘in which form they are easily separated. The object of this invention is to obtain the chlorides of those metals in a more eeonomieal manner, ‘and to this end it consists in,the treatmont of the sulphates by the use of chlorides, of sodium or other compounds of chlorine, such as chloride of potassinm, of ealeium, of magnesium, of strontium and the hypoehlontes of lite, potassa or soda; but espeeially the chloride of sodium, because of its cheapness and the readiness with which it may be obtained. Alred Monnier, of Philadelphia, Pa., is the inventor of this improvement, Inrroven Prinring Press—Mr. Charles Potter, Jr., of Westerly, R. I., has recently added and patented important improvements to his machine press, which is now known as‘ Potter's Improved Printing Press.” Throughout the numerous channels in which American inventive genius has displayed itself, there are few directions in which it has accoinplished more beneficial results then in its efforts to aid in bringing to perfection the machine printing press. ‘To sneh perfeetion has this class of machinery been carried that what formerly required the labor of a man and a boy for a day is now run off by a boy alone in an hour, and’in much better style than it eould possibly have been done by the presses in use thiriy years ago—aud the end is not yct. An Improven Quartz Mint.—A. Hitchoock, of New York, has recently patented an improved Chili mill, for grinding quartz, ete., which certainly appears to posse-s many advantages over any millof that description yet offered to the public. Practical miners, we believe, almost universally admit that the Chili mill will give a greater yield of gold to the ton of rock, than any other process of working. The only objection is that it is too slow in its results. The heaviest wheels used in the ordiuary Chili mills weigh about three tons, but even that weight is not sufiicient to crush the particles of quartz sufficiently fine until after the wheel las been made to pass over them several times. ‘To accomplish the desired resulé at one crushing and thrs hasten the process wonld require wheels of too unwicidy a weight to make them at all feasable, with the ordinary manner of procuring them. Mr. ‘Hitcheock has endeavored to remedy “this defect by placing a circular plate upon the top of these whcels and attaching the dri. ving power directly to this plate, which in revolving carries the wheels with it, the power being: transferred through this revols ing plate to the periphery of the wheels. Any desirable weight can be given to the wheels by placing weights upon the upper surface of this revolying plate. “This machine is illustrated in the vedi American of Noveniber 14, 1863. The Mining and Scientific Press Patent Agency, ' OFFICE, 57, GOVERNMENT 11 MIOUSE, SAN FRANCISCO. Information About Obtaining Patents, The Patent Law Amendment Act, of March 4th 1861, and March 34 1863, now if force, introduces several Important changes in onr Patent System. Tho goncral practice of the Patent Office, however, in regurd tothe examination and Issue of Letters Patent for, dew inven; dons, rermains nearly the same as herctotore. The amendinent ot 3d March, 1863, provides, Insectlon 3, thet eyery patent shall be dated us of a day not later than six months after the time at which it was passed and aliowed, and notico thereof sent to the applicant or hisngent, And If tho final fee tor such patent be not paid within the said six months, the patent shall be wlitheld, and the invention therein described shat] become public property ns agalnst the applicant therefor: Provided, That In all enses whore patents have been allowed previous to the passage of thls act, the sald six months shall be reckoned from the date of such Passage. The first qnestion, theretore, that presents itself to the inventor, who desires to procnre a patent, is: “Cun lobtaira patent? Apositive answer to this question ls only to bo had hy presenting a fornial applleation for patent lo the Government,embracing a petition, spect fication, nrodel, duplicate, drawings, and the payment of the preTs r 7 serlbed official fees. Aside from these steps, all the Inventor can do is, to submit his plans to persons experienced in the business of-obtaining patents, and solicit their opinion and advice. it the partics coustlted’ are honorable men, the Inventor may sately confide his . ideas to them, and they will Infonn him whether or not lis inven: . tion is probably patentable. Those who have made Inventions and desire to const with us respecting the same, are cordlally invited todoso. We shall be hap: py to see them In person at our oflice, or to advise them by mall, or through tlie Mining Axp Screntiri¢ Press. Innli casesthey may expeet from us an honest opinion. For these consultations, opInion and advice, we make no charge. Apen-anil-Ink sketch, and descrip” tlon of the invention shonld be sent, together with astamp fer return postage. Write plain ;:do not use pencil or pale ink ; be brief. Remember that all business cominitted to,our care, and ail consultatlons, arc kept by ns secret, and strictly confldentlal. Preliminary Examinations, In some eases lt may be advisable as a measnre of prudenec’to order a preliminary examination. This consists of a special search, . made at the U. S. Patent Office, Washingten, throngh the medium of our associate in that city, to ascertaln whetheraniong all the putents and models there stored, any invention can be found whieh is siinilar in chnracter to that of the applicant. On the compiction of this speciat scurch we send a written report to the party concerned, with snltable advice. Onr charge for this service, ineluding the re. port, Is ten dollars. This scarch, thongh it involves the expense just . named, will usually prove salisfactory. It jhe same dévice has . been before patented, the time ud cxpeuse of constructing models, preparing doenments, ete, W. ill In nost cases be saved ; if the invention has been In part patented, thé applicant will beenablo to nod” ify his claims and expoctations nccordingly. . Many olhor obvious advantages attending the Preliminary Examination ; althongh the strivtest search does not always enabie the applicant to Khow positively avhether.a patent can be had. Applicatlons for patents’ are often rejected becanse the Examining officer tinds a deserlption of the nileged Invention In some foreign pnblleasion ; or some other person has-beon previously rejected oh an analngous device) or some other inyentlon for a slmllar purpose, but partinily rescmbles . the applicant's in its construction ; jor the Government makes ‘an . nojust or nncommon detision. Agulnst none of these contingencies . does the Preliminary Examination Provide ; it will, however, geu. erally inform the applicant whether an Improvement simlar te his and used for the sathe pnrpose has cyer béct DE ornot In'this country. . Persons desirlng the Prellminnry examination are requested to! remit the tee ($10), and furnish us with a sketeh wud ge ST of} the Invention, ‘ Caveats. A Caveat Isa confidential communication made to the Patent . Office, and is therefore fled within its accret archives. The privi. lege secured under a caveat is, that it entitles the eaventor to reecive notlee, for a perlud of one year, of nny apploatlon for a patent sub-, sequently fled, aud which {is adjudged to be novel, and is likely to . Interfere with the Invention described in the eay ent, and the cayentor is then required to complete his application for a patent within’) three months from the date of sald uptlee, Caveat papers shonld be . very carefully prepared, ‘Our fee for the serviee varies from $10 to $20. The Government teo under the new law'is reduced to tén dal + lars ; and this sum docs not apply, as heretofore, as part of the fee on presenting an application fora patent, . Inventors will oftimes find tt very Important to take adyantage of the caveat system—the expense under the law belay comparatively sinall. To enable us to prepare caveat paper, we only require a sketch and description of the Invention ; 10 model belig necessary. Expeuse of Applying for a Patent, Rejections, eto. Under the new law, the Government fee, on Ming an application for a patent, ls titteen dollars ; und it the patent Is ullowed, twenty dollars additonal ls reqnired. It rejected, the iirst feo of tlfteen dollars Is all that is demanded. English, French, Anstrian, Prussinn, Spanish, and Inventors of every natiouallty, may now obtaln patents m the United States upon the same terms us our own citlzens. The only discrimination made is agalnst subjects of governments that discriminate against the inhabitants of the Uniied States, To the foregolug oMcial fecs must be added the Attorney's fees for preparing the varlous documents nul drawings. Our charge for, preparing a ease, presenting It to the Government, and atiending to. ull business connected with it, nntil a decision is given, is from $20 to $40. 1f the patent is granted no further agency expenses ensucs.— If the application Is rejeeted we cause a thorongh Investigation to be made into the rensons presented to the Commulssioner tor refusing the patent. In making this examination, we have execss to all the drawings, models, books and specifications cltel In reference, and we report the result as early as possible to our client. For this ser vice we muke no charge. If the rejection proves to be an unjust one—which sometimes happens—it can generally be rey ersed, and the patent obtalned by contesting the case, Foy emote we eluarge a fee proportionatg to the extra labor involy cu, Puy able ouly on the issne of the patent; but our demand. will he reasonable nnd sutistactory to onr elicnts, and will be arranged befor chand by special agreement. The system adopted by us works wi ell, gives geucral satisfaction,” and presents to all applicants, rich or Noor, an eyual »pportunity of. having their patent cases prepared, couducteil and pr osveuted In the al best manner, by experienced: attorney's, npon the most iotlerate” terms. Inventors who have rejected cases, prepared either by them . selves, or for them by other ascnts, and desire to ascertain thelr . prospects of suceass by further efforts, are Invited to avail themselves of onr uneqnalled tacilities in securing tavarable resnlts, We have been suceesstnl Iu scenring Letters Vatent In many cases of such a matter, Our terms for such cuses are very moderate, Models, Remittanoes, etc. : The laws requires that the inventor shall,. Im all casea, Ie a mole, which must not exceed twelve inches in any of its dimentions; itshould be ucatly made, of hard wood or ictal, or both vurblshed or painted ; the naine of the inventor should be engraved or pninted on it conspicuously, When the Invention consists of an improvement on some known, machine, a full working model of the whole will not be, necessary It should be sufllciently perfect, fowever, to show, with clear ness, she nature and operation of the invention. As soon ug the model is ready, It should be carefully boxed and shipped by express or otherwise, to our address, namely: Dewrr & Co., Minlng and Selentifie Press, rooms 56 and 57, Qoverument House, corner of Satisonie and Washhigton Streets, Son Franelsco, Cal. Prepay expenses and send express v1 eceipt to us by mail. Simultaneously with the model, the Inventér should send us thy . Ings, and other urticles. . ‘frst lustallment of the Government fee, fifteen dollars. The money may be forwarded cliher by express wlth the model, or by mail.— The safest way to romitis by draft on San Franelsco, payablo to our order. Always send a letter with the model, and also the LATS stating the name and address of the sender. A full deserlption shonld also be sent with the model, embodyi ing all the ideas of the Inventor respecting the improvement. On the reecipt of the model and Government fee, the case Is duly egistered upon our books, and the application proceeded with as fast as possible. When the documents are ready we send them lo the inventor by mall, tor his. examination, siguiture and affidavit, wlth adetterjot Instruction, etg. Our tee tor preparing the case Is then duc, and will be called for, The case will then be presented to the Patcut Otfice, and as soon as the patent is‘ordered to be Issued, the applicant will be notified. to remit the last Installment of the Goyernment fee, namely, twenty dollars. Inventors who do business with iss will be notifted of the state of their applivatlon in the Patent Office, when ttis possible for us to do so. We donot require the personal attendance of tho inventor, nnless it is one of great complication ; the business can be well done by correspondence. When the Inventlon consists of a new article of manufacture, or Anew composition, samples of tho separate ingredlents, sufictent to makethe experiment, and also of the mandfnetured artlete itself must be furnished, The average time required to procure a 1 patent, when the case ig conducted nt our agency, isthrea months. We frequently get them! through Lo.less time ; but in other cases, owlng to delay on the part of ottclals, the Period is sometimes extended to four or tive montlis, anil even more. Wo make a apeclal point to forv ‘ata our cases’ ag rapidly as possible. unth. Return of Models, Under the new law, If the aysplicants case fate been rbjected he Se entitled to withdraw his model from the Patent Office: ° This law appli¢s to, nll past rejceted cases, and If parties wish a obtain thelr models thr ‘ough us, they can do se at a small expense Application for Patents, Designs, Trade-Marks, Labells, eto. Unfler the new law patents nay be taken ont for any new form of* any article, also for tools, patterns, castings, machine-frar stove: Ta tes, borders, rnges, all new designs for printing, weaving or stampihy vipon ‘siTKs, cilicoes, ‘enrpets, ofl-cloth, prints, paper-hanyTrade-murks, labels, envelopes, boxes and bottles for foods, may algo be patented ; likewise nll works of art, Inelnding prints, ‘paintings, busts, statues, basrellef, or compositions in alto, or busso felievo, new dics, nnpressions, ornaments to jbe placed upon any article of mnnufaeture, architectural work, ctc. Our fucllities for the prompt preparatlon and xceluring of patents are of the most extenslve character and our charges are very moderate. Whe —" Patent Office Fees, and How Payable. Nearly all tho fees payuble to the Vatent Oflee are positively roquitod by law to be paid in ndvaice. For tho suke of uniformity and convenle nee, the remaining fees will be required to be paid In the same manner ; that Is to say, belord tho Inbor Ix cia for which they are ‘to be reeelved it payment. 4 The following i is the trrlif of. tees established by law: On every applleation for a design, tor3y enurs and six months $10 00 On eve: ppllextion for a design, tur seven yoars 5 00 On every application for a design, for fourteen year 30 00 On every enveat 10 00 On cvery appllention for 7 pater 15 00 On issalug each original patent. 220 00 On filing a disclalmer.. Chet 10 00 Onexery application for a re-issue, . On every additional patent granted on a re-issue Ou cyery application for an extenslon On the grant of every extension On apponl to tha Commissl from Ex I's: ie ehiet. On every appeal to the Judges of Clrenit Court, D. CG. .. Infringements, The manufacture, sale, or uso of n patented article, without con. sent of the owner of the patent, is av lufringement, rnd subjecis the Infringer, by Injunetion from the Court, to an urrest of er prubibltion trom the employment of lis machinery, shop, works, factory . and men in production of the article. Ini addillon to injunction the Intringer Is Hable to be muiched in trebic the amount Of damages awarded by tho jury. The maker, the workman, the seller, and the purcliascr, If a user, are all liable either collectively or indlvidually. Having aceess to all the patents, models, pubile records, drawings and other documents pertalning to the Patent Office, we are prepared.to make examinuttons and gixe opinions upon all Infringe-, Tient qnestlons, advise as to the scope and grolind covered by pat: ents, and direct with vigor any legal proceedings therewlth connected. Our charge will be moderate, and phagwartlonate to the labor UsieTh yet Appeals. Im rejectéd and other cases, the new law proviiles for an appea from the Examiner: In. chef to Ihe Commissloncr in person, on, the payment of. a fee of twenty dollars. A further sue nay be taken from the deelsion of the Commissioner té the U. 8. Conrt, of tho District of Golumbia. Lhes¢ appeals are hearil by any of the Judges before whom the applicant clects to bring the ense. NoJury. All the papers, models, etc., are sent by the Commissioner to the Judye, who then reyiews the case, and ¢ither sustains or reverses the Commissloner's decision. The party taking lhe appeal pays an additional fee of twenly-five dollirs, The Jndge appoints a day of hearing. The applicant enu appear in person or by connsel te state his ense and fic a written arRument. Five days are atlowed the opponent ro put in aii answer 4 and ashnilar period to the appelant tor a clusing reply. Many important cases ure brought before the Jitdyes on appeal, and the declsiousof the Commlsslouerure not imfrequontly rev ersed, We bave had suecessful expericnee in condneting these apnea a and on serviecs are rendered on moilerave terins. i DEWEY . €O., Agents, Mining and Scientific Press Office, Government Llouse, corner Sansome and Washinton streets, San Francisco. Patent Ciaims.—W ew “ill sameROih on application, the ctnim of any Invention’ tha¢has been patented within the Inst fourteen years. Tho name of the patentee, date of patent, When known, and two dollars for copying, shouldbe sent. 1 : om Back Nambers.—We hove a limited number of past yolumes of the Press ot hand, which will be suld, veatly bound, at Teasona ; ble rates. A portion of the back uuuabers ot the paper can be hud by the single copy.

26. The Blining and Srientitie Bvess, Latent Office Department, = Treatine Sutpuates or Corrrr, Copatt anp Nickie to Oxstain tier CuLoriprs.—Heretofore, says the Scientific American, it has been eustomary in the separation of two or more sulphates, to use the difference of temperature or concentration of a solutiou and let it chrystalize : but the sulphates of copper, eobalt and niekle, the separation of which eannot be effected by ehrystalization, nor by the usual mode of separation employed for these metals—have been precipitated by the addition of lime or other reagents, and then dissolved in muriatic or other acid, so as to obtain'those metals as chlorides, ‘in which form they are easily separated. The object of this invention is to obtain the chlorides of those metals in a more eeonomieal manner, ‘and to this end it consists in,the treatmont of the sulphates by the use of chlorides, of sodium or other compounds of chlorine, such as chloride of potassinm, of ealeium, of magnesium, of strontium and the hypoehlontes of lite, potassa or soda; but espeeially the chloride of sodium, because of its cheapness and the readiness with which it may be obtained. Alred Monnier, of Philadelphia, Pa., is the inventor of this improvement, Inrroven Prinring Press—Mr. Charles Potter, Jr., of Westerly, R. I., has recently added and patented important improvements to his machine press, which is now known as‘ Potter's Improved Printing Press.” Throughout the numerous channels in which American inventive genius has displayed itself, there are few directions in which it has accoinplished more beneficial results then in its efforts to aid in bringing to perfection the machine printing press. ‘To sneh perfeetion has this class of machinery been carried that what formerly required the labor of a man and a boy for a day is now run off by a boy alone in an hour, and’in much better style than it eould possibly have been done by the presses in use thiriy years ago—aud the end is not yct. An Improven Quartz Mint.—A. Hitchoock, of New York, has recently patented an improved Chili mill, for grinding quartz, ete., which certainly appears to posse-s many advantages over any millof that description yet offered to the public. Practical miners, we believe, almost universally admit that the Chili mill will give a greater yield of gold to the ton of rock, than any other process of working. The only objection is that it is too slow in its results. The heaviest wheels used in the ordiuary Chili mills weigh about three tons, but even that weight is not sufiicient to crush the particles of quartz sufficiently fine until after the wheel las been made to pass over them several times. ‘To accomplish the desired resulé at one crushing and thrs hasten the process wonld require wheels of too unwicidy a weight to make them at all feasable, with the ordinary manner of procuring them. Mr. ‘Hitcheock has endeavored to remedy “this defect by placing a circular plate upon the top of these whcels and attaching the dri. ving power directly to this plate, which in revolving carries the wheels with it, the power being: transferred through this revols ing plate to the periphery of the wheels. Any desirable weight can be given to the wheels by placing weights upon the upper surface of this revolying plate. “This machine is illustrated in the vedi American of Noveniber 14, 1863. The Mining and Scientific Press Patent Agency, ' OFFICE, 57, GOVERNMENT 11 MIOUSE, SAN FRANCISCO. Information About Obtaining Patents, The Patent Law Amendment Act, of March 4th 1861, and March 34 1863, now if force, introduces several Important changes in onr Patent System. Tho goncral practice of the Patent Office, however, in regurd tothe examination and Issue of Letters Patent for, dew inven; dons, rermains nearly the same as herctotore. The amendinent ot 3d March, 1863, provides, Insectlon 3, thet eyery patent shall be dated us of a day not later than six months after the time at which it was passed and aliowed, and notico thereof sent to the applicant or hisngent, And If tho final fee tor such patent be not paid within the said six months, the patent shall be wlitheld, and the invention therein described shat] become public property ns agalnst the applicant therefor: Provided, That In all enses whore patents have been allowed previous to the passage of thls act, the sald six months shall be reckoned from the date of such Passage. The first qnestion, theretore, that presents itself to the inventor, who desires to procnre a patent, is: “Cun lobtaira patent? Apositive answer to this question ls only to bo had hy presenting a fornial applleation for patent lo the Government,embracing a petition, spect fication, nrodel, duplicate, drawings, and the payment of the preTs r 7 serlbed official fees. Aside from these steps, all the Inventor can do is, to submit his plans to persons experienced in the business of-obtaining patents, and solicit their opinion and advice. it the partics coustlted’ are honorable men, the Inventor may sately confide his . ideas to them, and they will Infonn him whether or not lis inven: . tion is probably patentable. Those who have made Inventions and desire to const with us respecting the same, are cordlally invited todoso. We shall be hap: py to see them In person at our oflice, or to advise them by mall, or through tlie Mining Axp Screntiri¢ Press. Innli casesthey may expeet from us an honest opinion. For these consultations, opInion and advice, we make no charge. Apen-anil-Ink sketch, and descrip” tlon of the invention shonld be sent, together with astamp fer return postage. Write plain ;:do not use pencil or pale ink ; be brief. Remember that all business cominitted to,our care, and ail consultatlons, arc kept by ns secret, and strictly confldentlal. Preliminary Examinations, In some eases lt may be advisable as a measnre of prudenec’to order a preliminary examination. This consists of a special search, . made at the U. S. Patent Office, Washingten, throngh the medium of our associate in that city, to ascertaln whetheraniong all the putents and models there stored, any invention can be found whieh is siinilar in chnracter to that of the applicant. On the compiction of this speciat scurch we send a written report to the party concerned, with snltable advice. Onr charge for this service, ineluding the re. port, Is ten dollars. This scarch, thongh it involves the expense just . named, will usually prove salisfactory. It jhe same dévice has . been before patented, the time ud cxpeuse of constructing models, preparing doenments, ete, W. ill In nost cases be saved ; if the invention has been In part patented, thé applicant will beenablo to nod” ify his claims and expoctations nccordingly. . Many olhor obvious advantages attending the Preliminary Examination ; althongh the strivtest search does not always enabie the applicant to Khow positively avhether.a patent can be had. Applicatlons for patents’ are often rejected becanse the Examining officer tinds a deserlption of the nileged Invention In some foreign pnblleasion ; or some other person has-beon previously rejected oh an analngous device) or some other inyentlon for a slmllar purpose, but partinily rescmbles . the applicant's in its construction ; jor the Government makes ‘an . nojust or nncommon detision. Agulnst none of these contingencies . does the Preliminary Examination Provide ; it will, however, geu. erally inform the applicant whether an Improvement simlar te his and used for the sathe pnrpose has cyer béct DE ornot In'this country. . Persons desirlng the Prellminnry examination are requested to! remit the tee ($10), and furnish us with a sketeh wud ge ST of} the Invention, ‘ Caveats. A Caveat Isa confidential communication made to the Patent . Office, and is therefore fled within its accret archives. The privi. lege secured under a caveat is, that it entitles the eaventor to reecive notlee, for a perlud of one year, of nny apploatlon for a patent sub-, sequently fled, aud which {is adjudged to be novel, and is likely to . Interfere with the Invention described in the eay ent, and the cayentor is then required to complete his application for a patent within’) three months from the date of sald uptlee, Caveat papers shonld be . very carefully prepared, ‘Our fee for the serviee varies from $10 to $20. The Government teo under the new law'is reduced to tén dal + lars ; and this sum docs not apply, as heretofore, as part of the fee on presenting an application fora patent, . Inventors will oftimes find tt very Important to take adyantage of the caveat system—the expense under the law belay comparatively sinall. To enable us to prepare caveat paper, we only require a sketch and description of the Invention ; 10 model belig necessary. Expeuse of Applying for a Patent, Rejections, eto. Under the new law, the Government fee, on Ming an application for a patent, ls titteen dollars ; und it the patent Is ullowed, twenty dollars additonal ls reqnired. It rejected, the iirst feo of tlfteen dollars Is all that is demanded. English, French, Anstrian, Prussinn, Spanish, and Inventors of every natiouallty, may now obtaln patents m the United States upon the same terms us our own citlzens. The only discrimination made is agalnst subjects of governments that discriminate against the inhabitants of the Uniied States, To the foregolug oMcial fecs must be added the Attorney's fees for preparing the varlous documents nul drawings. Our charge for, preparing a ease, presenting It to the Government, and atiending to. ull business connected with it, nntil a decision is given, is from $20 to $40. 1f the patent is granted no further agency expenses ensucs.— If the application Is rejeeted we cause a thorongh Investigation to be made into the rensons presented to the Commulssioner tor refusing

the patent. In making this examination, we have execss to all the drawings, models, books and specifications cltel In reference, and we report the result as early as possible to our client. For this ser vice we muke no charge. If the rejection proves to be an unjust one—which sometimes happens—it can generally be rey ersed, and the patent obtalned by contesting the case, Foy emote we eluarge a fee proportionatg to the extra labor involy cu, Puy able ouly on the issne of the patent; but our demand. will he reasonable nnd sutistactory to onr elicnts, and will be arranged befor chand by special agreement. The system adopted by us works wi ell, gives geucral satisfaction,” and presents to all applicants, rich or Noor, an eyual »pportunity of. having their patent cases prepared, couducteil and pr osveuted In the al best manner, by experienced: attorney's, npon the most iotlerate” terms. Inventors who have rejected cases, prepared either by them . selves, or for them by other ascnts, and desire to ascertain thelr . prospects of suceass by further efforts, are Invited to avail themselves of onr uneqnalled tacilities in securing tavarable resnlts, We have been suceesstnl Iu scenring Letters Vatent In many cases of such a matter, Our terms for such cuses are very moderate, Models, Remittanoes, etc. : The laws requires that the inventor shall,. Im all casea, Ie a mole, which must not exceed twelve inches in any of its dimentions; itshould be ucatly made, of hard wood or ictal, or both vurblshed or painted ; the naine of the inventor should be engraved or pninted on it conspicuously, When the Invention consists of an improvement on some known, machine, a full working model of the whole will not be, necessary It should be sufllciently perfect, fowever, to show, with clear ness, she nature and operation of the invention. As soon ug the model is ready, It should be carefully boxed and shipped by express or otherwise, to our address, namely: Dewrr & Co., Minlng and Selentifie Press, rooms 56 and 57, Qoverument House, corner of Satisonie and Washhigton Streets, Son Franelsco, Cal. Prepay expenses and send express v1 eceipt to us by mail. Simultaneously with the model, the Inventér should send us thy . Ings, and other urticles. . ‘frst lustallment of the Government fee, fifteen dollars. The money may be forwarded cliher by express wlth the model, or by mail.— The safest way to romitis by draft on San Franelsco, payablo to our order. Always send a letter with the model, and also the LATS stating the name and address of the sender. A full deserlption shonld also be sent with the model, embodyi ing all the ideas of the Inventor respecting the improvement. On the reecipt of the model and Government fee, the case Is duly egistered upon our books, and the application proceeded with as fast as possible. When the documents are ready we send them lo the inventor by mall, tor his. examination, siguiture and affidavit, wlth adetterjot Instruction, etg. Our tee tor preparing the case Is then duc, and will be called for, The case will then be presented to the Patcut Otfice, and as soon as the patent is‘ordered to be Issued, the applicant will be notified. to remit the last Installment of the Goyernment fee, namely, twenty dollars. Inventors who do business with iss will be notifted of the state of their applivatlon in the Patent Office, when ttis possible for us to do so. We donot require the personal attendance of tho inventor, nnless it is one of great complication ; the business can be well done by correspondence. When the Inventlon consists of a new article of manufacture, or Anew composition, samples of tho separate ingredlents, sufictent to makethe experiment, and also of the mandfnetured artlete itself must be furnished, The average time required to procure a 1 patent, when the case ig conducted nt our agency, isthrea months. We frequently get them! through Lo.less time ; but in other cases, owlng to delay on the part of ottclals, the Period is sometimes extended to four or tive montlis, anil even more. Wo make a apeclal point to forv ‘ata our cases’ ag rapidly as possible. unth. Return of Models, Under the new law, If the aysplicants case fate been rbjected he Se entitled to withdraw his model from the Patent Office: ° This law appli¢s to, nll past rejceted cases, and If parties wish a obtain thelr models thr ‘ough us, they can do se at a small expense Application for Patents, Designs, Trade-Marks, Labells, eto. Unfler the new law patents nay be taken ont for any new form of* any article, also for tools, patterns, castings, machine-frar stove: Ta tes, borders, rnges, all new designs for printing, weaving or stampihy vipon ‘siTKs, cilicoes, ‘enrpets, ofl-cloth, prints, paper-hanyTrade-murks, labels, envelopes, boxes and bottles for foods, may algo be patented ; likewise nll works of art, Inelnding prints, ‘paintings, busts, statues, basrellef, or compositions in alto, or busso felievo, new dics, nnpressions, ornaments to jbe placed upon any article of mnnufaeture, architectural work, ctc. Our fucllities for the prompt preparatlon and xceluring of patents are of the most extenslve character and our charges are very moderate. Whe —" Patent Office Fees, and How Payable. Nearly all tho fees payuble to the Vatent Oflee are positively roquitod by law to be paid in ndvaice. For tho suke of uniformity and convenle nee, the remaining fees will be required to be paid In the same manner ; that Is to say, belord tho Inbor Ix cia for which they are ‘to be reeelved it payment. 4 The following i is the trrlif of. tees established by law: On every applleation for a design, tor3y enurs and six months $10 00 On eve: ppllextion for a design, tur seven yoars 5 00 On every application for a design, for fourteen year 30 00 On every enveat 10 00 On cvery appllention for 7 pater 15 00 On issalug each original patent. 220 00 On filing a disclalmer... Chet 10 00 Onexery application for a re-issue, . On every additional patent granted on a re-issue Ou cyery application for an extenslon On the grant of every extension On apponl to tha Commissl from Ex I's: ie ehiet. On every appeal to the Judges of Clrenit Court, D. CG. .... Infringements, The manufacture, sale, or uso of n patented article, without con. sent of the owner of the patent, is av lufringement, rnd subjecis the Infringer, by Injunetion from the Court, to an urrest of er prubibltion trom the employment of lis machinery, shop, works, factory . and men in production of the article. Ini addillon to injunction the Intringer Is Hable to be muiched in trebic the amount Of damages awarded by tho jury. The maker, the workman, the seller, and the purcliascr, If a user, are all liable either collectively or indlvidually. Having aceess to all the patents, models, pubile records, drawings and other documents pertalning to the Patent Office, we are prepared.to make examinuttons and gixe opinions upon all Infringe-, Tient qnestlons, advise as to the scope and grolind covered by pat: ents, and direct with vigor any legal proceedings therewlth connected. Our charge will be moderate, and phagwartlonate to the labor UsieTh yet Appeals. Im rejectéd and other cases, the new law proviiles for an appea from the Examiner: In. chef to Ihe Commissloncr in person, on, the payment of. a fee of twenty dollars. A further sue nay be taken from the deelsion of the Commissioner té the U. 8. Conrt, of tho District of Golumbia. Lhes¢ appeals are hearil by any of the Judges before whom the applicant clects to bring the ense. NoJury. All the papers, models, etc., are sent by the Commissioner to the Judye, who then reyiews the case, and ¢ither sustains or reverses the Commissloner's decision. The party taking lhe appeal pays an additional fee of twenly-five dollirs, The Jndge appoints a day of hearing. The applicant enu appear in person or by connsel te state his ense and fic a written arRument. Five days are atlowed the opponent ro put in aii answer 4 and ashnilar period to the appelant tor a clusing reply. Many important cases ure brought before the Jitdyes on appeal, and the declsiousof the Commlsslouerure not imfrequontly rev ersed, We bave had suecessful expericnee in condneting these apnea a and on serviecs are rendered on moilerave terins. i DEWEY . €O., Agents, Mining and Scientific Press Office, Government Llouse, corner Sansome and Washinton streets, San Francisco. Patent Ciaims.—W ew “ill sameROih on application, the ctnim of any Invention’ tha¢has been patented within the Inst fourteen years. Tho name of the patentee, date of patent, When known, and two dollars for copying, shouldbe sent. 1 : om Back Nambers.—We hove a limited number of past yolumes of the Press ot hand, which will be suld, veatly bound, at Teasona ; ble rates. A portion of the back uuuabers ot the paper can be hud by the single copy.