Expired Canadian patentCanada
Heteroaromatic acetylenes useful as antihypertensive agents
CA 1292739 C · Owner: Mcneilab, Inc. · Inventors: Carson, John R.
Overview
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Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Heterocyclic acetylenes of the formula (I): wherein Y and R1 are substituents as disclosed m is, 0-2, R2 is branched alkyl and Het is an aromatic heterocycle. The acetylenes are useful in treating hypertension and/or angina.
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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
- Granted December 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1986
GrantedDecember 3, 1991
Term endedDecember 3, 2008
Patent numberCA 1292739 C
Classification (IPC)C07D213/38 +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.