Expired Canadian patentCanada
3-aroyl-2-oxindole-1-carboximides
CA 2026974 C · Owner: Pfizer Inc. · Inventors: Schulte, Gary R.; Ehrgott, Frederick 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
Process for making antiinflammatory 3-aroyl-2oxindole-1-carboxamides by reductive debromination or deiodination of 3-(bromo- or iodoaroyl) -2-oxindole-1carboxamides.
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
- Filed October 4, 1990 and granted December 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 4, 2012.
- 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 4, 1990
GrantedDecember 21, 1999
Term endedOctober 4, 2010
Patent numberCA 2026974 C
Classification (IPC)C07D409/06 +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.