Expired Canadian patentCanada
3-(2-furoyl)-5-alkoxycarbonyl-2,6-dimethyl-4- (2-nitrophenyl)-1,4-dihydropyridine calcium antagonists
CA 1262906 C · Owner: Spedding, Michael · Inventors: Gittos, Maurice Ward; Spedding, Michael
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 1,4-dihydropyridine derivatives have the following general Formula:, and are calcium antagonists useful for treating cardio-, vascular diseases. C-31,782
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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 November 14, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 14, 2006.
- 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 2, 1984
GrantedNovember 14, 1989
Term endedNovember 14, 2006
Patent numberCA 1262906 C
Classification (IPC)C07D405/06
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.