Substituted 1h-indazole-3-carboxamides
CA 2021685 A1 · Owner: Duphar International Research B.V. · Inventors: Hamminga Derk; Van Wijngaarden, Ineke
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is concerned with compounds of formula 1:, (1), wherein, R1 is straight or branched alkyl having 1-4 C-atoms halogen or cyano;, n has the value 0-1; R2 is hydrogen, (1-6 C)alkyl, (3-6 C)alkenyl (3-6 C)alkenyl, (3-6 C)cycloalkyl, (3-6 C)cycloalkyl- (1-4 C)alkyl, phenyl, phenyl-(1-3 C)alkyl COOR6, COR6, CONR6R7 or SO2-R6, wherein R6 and R7 independently of each other are hydrogen, (1-6 C)alkyl (3-6 C)cycloalkyl, phenyl or phenyl-(1-4 C)alkyl wherein the benzene ring is optionally substituted with a methyl group or a halogen atom, with the proviso that R6 is not hydrogen when R2 is a group COOR6 or SO2R6;, R3 is hydrogen, straight or branched (1-6 C)alkyl or a phenyl-(1-3 …
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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 July 20, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.