Expired Canadian patentCanada
4-mercaptoacetylamino-2 benzazepinone(3) derivatives, and use as enkephalinase inhibitors
CA 2135751 C · Owner: Merrell Dow Pharmaceuticals Inc. · Inventors: Flynn, Gary A.; Warshawsky, Alan M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel mercaptoacetylamide tricyclic derivatives of formula (I) useful as inhibitors of enkephalinase.
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 April 6, 1993 and granted September 21, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 6, 1993
GrantedSeptember 21, 1999
Term endedApril 6, 2013
Patent numberCA 2135751 C
Classification (IPC)C07D471/04 +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.