Benzimidazole derivatives
CA 1305481 C · Owner: Yamada, Hiroaki · Inventors: Yamada, Hiroaki; Sugai, Toshiji; Yanai, Makoto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds are described of formula (I) (I), wherein R1 is a hydrogen atom, an alkyl group an alkoxy, group, a dialkylamino group or a halogen atom; n is 1 to 4; R2 is a hydrogen atom, an alkyl group an unsubstituted, or substituted aminoalkyl group an acyl group, an, unsubstituted or substituted aralkyl group a carboxyalkyl, group, an alkoxycarbonylalkyl group or wherein X is an unsubstituted or substituted-phenyl -benzyl, -benzoyl or -furoyl group; A is -NR3- where R3 is hydrogen or alkyl, an alkylene or an alkylidene; and B is a heterocyclic group selected from triazolyl pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl benzimidazolyl, benzothiazolyl, quinolyl and isoquinolyl said, …
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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 July 21, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 21, 2009.
- 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.