Expired Canadian patentCanada
Separating nickel from solutions containing nickel and cobalt
CA 553402 A · Owner: Sherritt Gordon Mines Limited · Inventors: Benoit, Robert L.; Mackiw, Vladimir N.
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 February 18, 1958. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 1975.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 10, 1956
GrantedFebruary 18, 1958
Term endedFebruary 18, 1975
Patent numberCA 553402 A
Classification (IPC)C22B3/44
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.