Heterocyclically substituted piperazinoalkylbenzoxazine and piperazinolkylbenzothiazine compounds, processes for preparing them, and medicaments containing them
CA 2056009 A1 · Owner: White, Richard · Inventors: Jasserand, Daniel; Floc'H, Francois; Jasserand, Daniel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmacologically active compounds corresponding to the general formula I, which are optionally substituted in the benzene ring and in which, X denotes oxygen or sulfur, Y denotes oxygen or sulfur R1 denotes hydrogen or lower alkyl, n is an integer from 0 to 4 and, R4 is an optionally substituted 6-membered unsaturated heterocycle containing 1 or 2 nitrogen atoms not directly bonded to the piperazine ring and physiologically acceptable acid addition salts thereof.
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 November 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 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.