Substituted 2,3,4,9-tetrahydro-1h-carbazole-1-acetic acid
CA 1311486 C · Owner: American Home Products Corporation · Inventors: Demerson, Christopher A.; Humber, Leslie G.; Hughes, Philip F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted 2,3,4,9-tetrahydro-1-carbazole-1-acetic acid derivatives and methods for their preparation and use are disclosed. The compounds are useful analgesic and anti-inflammatory agents. They have the structure:, (I), wherein R and R2 are hydrogen or lower alkyl containing 1 to 4 carbon atoms and R1 is lower alkyl containing 1 to 4 carbon atoms and the pharmaceutically acceptable salts thereof.
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 December 15, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.