Expired Canadian patentCanada
Mineral flotation collectors
CA 1137656 A · Owner: Societe Nationale Elf Aquitaine · Inventors: Larribau, Etienne; Tozzolino, Pierre
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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 26, 1979
GrantedDecember 14, 1982
Term endedDecember 14, 1999
Patent numberCA 1137656 A
Classification (IPC)B03D1/02 +1 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.