Reports of Patent, Design, and Trade Mark Cases Volume 12

Reports of Patent, Design, and Trade Mark Cases Volume 12

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ...in the Provisional Specification, then the patent is bad. LINDLEY, L.J.--If in the Provisional he tells you the nature of the invention, treating powdered ore with cyanide of potassium, and does not mention the strength, but tells that in the Complete, is that anything more than describing the manner in which the invention is to be performed? Yes. Finding out that powdered ore treated with a cyanogen solution will yield up its gold in solution, and finding out that treated with a dilute solution it yields up the ore under different conditions, the baser metals being left behind, are two different inventions. The first invention, which is that described in the Provisional, is simply that a cyanogen solution will make powdered ore yield up its gold. Of course, the Patentee does not actually invent what takes place in either case. If, then, his first claim is bad, and he is left with his second claim, there is disconformity. The Provisional Specification merely gives the known information that cyanide of potassium gets gold out of ore; it does not tell the public that a particular strength of cyanide will get out the gold, leaving the other metals. The use of the word " extract" cannot bc sutficient to show that he meant the selective action. The Provisional Specification in no way limited the strength. Sanders' Specification stated clearly that the use of cyanides for the extraction of gold was known. If the Plaintiffs' invention was really only as to the dilute solution, then they did not tell the public that by their Provisional. LINDLEY, L.J.--His 'claim seems to be "I have described that " cyanide of potassium is the best solvent of gold in ore, and in the Complete " I tell you exactly how...show more

Product details

  • Paperback | 388 pages
  • 189 x 246 x 20mm | 689g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236815351
  • 9781236815354