Benzimidazolinone derivatives
CA 2040235 A1 · Owner: Maruyama, Tatsuya · Inventors: Hara, Hiromu; Takeuchi, Makoto; Mase, Toshiyasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Benzimidazolinone derivatives of the general formula (I): (I), wherein R1, R2 and R3, which may be the same or different each is a hydrogen or halogen atom or a lower alkyl halo-, lower alkyl, hydroxy-lower alkyl hydroxyl, lower alkoxy, aryloxy, acyl, cyano carboxyl, a lower alkoxycarbonyl, carbamoyl nitro or nitrogen-containing 5- or 6-membered heterocyclic group; A is an ethylene group which may optionally have at least one branch; R'' and R5 which may be, the same or different, each is a lower alkyl group or R4 and R5, together with the adjacent nitrogen atom represent a, pyrrolidinyl, piperidino or a morpholino group provided that when , is a piperidino or diethylamino group at, least …
Read the whole patent
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 April 11, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.