Expired Canadian patentCanada
Conversion of polycarboxylic acids to polyols by reaction with bicyclic amide acetals
CA 1264056 C · Owner: Richards, Harvey J. · Inventors: Goel, Anil B.; Richards, Harvey J.
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 preparing polyols from polycarboxylic acids by the reaction of a bicyclic amide acetal with a polycarboxylic acid is described.
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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 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 27, 2006.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 12, 1985
GrantedDecember 27, 1989
Term endedDecember 27, 2006
Patent numberCA 1264056 C
Classification (IPC)C08G18/38 +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.