Expired Canadian patentCanada
Piperazine derivatives
CA 2053709 C · Owner: Cliffe, Ian Anthony · Inventors: Cliffe, Ian Anthony
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2,3,4,5,6,7-Hexahydro-1-{4-1-4-(2-methoxyphenyl)piperazinyl-2-phenylbutyryl}-1H-azepine and the pharmaceutically acceptable acid addition salts thereof are 5-HT1A binding agents useful, for example as, anxiolytics. (see formula I)
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 18, 1991 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2013.
- 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 18, 1991
GrantedDecember 11, 2001
Term endedOctober 18, 2011
Patent numberCA 2053709 C
Classification (IPC)C07D403/06 +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.