Expired Canadian patentCanada
Method for recovering silver and gold in solid silver or gold bearing matter
CA 1090141 A · Owner: Societe Des Mines Et Fonderies De Zinc De La Vieille Montagne · Inventors: Bodson, Fernand J.J.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordRead the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted November 25, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 25, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 19, 1977
GrantedNovember 25, 1980
Term endedNovember 25, 1997
Patent numberCA 1090141 A
Classification (IPC)C22B11/00 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.