Expired Canadian patentCanada
Compacting calcium phosphate
CA 1216412 B · Owner: Stauffer Chemical Company Division Of Rhone-Poulenc, Inc. · Inventors: Gerard, Thomas W.
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 treating calcium phosphate fine particles which includes the step of compacting the particles under pressure to form a sheet.
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 March 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2002.
- 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 27, 1981
GrantedMarch 5, 1985
Term endedMarch 5, 2002
Patent numberCA 1216412 B
Classification (IPC)C01B25/32 +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.