Expired Canadian patentCanada
Procedure for the electrostatic processing of crude argillaceous salts
CA 1333271 C · Owner: Kali Und Salz Aktiengesellschaft · Inventors: Fricke, Gunter; Geisler, Iring
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the electrostatic separation of crude argillaceous salts is described, in which the clay acquires the same kind of electric charge as rock salt and carnallite.
Read 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 29, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 29, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 24, 1989
GrantedNovember 29, 1994
Term endedNovember 29, 2011
Patent numberCA 1333271 C
Classification (IPC)B03C7/02 +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.