Expired Canadian patentCanada
Substituted imidazole derivatives
CA 2091304 C · Owner: Poss, Michael A. · Inventors: Poss, Michael A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel compounds having the formula, where A is or, and, X, R1, R2. R3, R4, R5 and R6 are as defined herein. These compounds inhibit the action of angiotensin II and are useful, therefore for example as, antihypertensive agents.
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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
- Filed March 9, 1993 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 9, 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.
FiledMarch 9, 1993
GrantedDecember 30, 2003
Term endedMarch 9, 2013
Patent numberCA 2091304 C
Classification (IPC)C07F9/54 +1 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.