Indene compounds
CA 1269977 C · Owner: Oshika, Yasuhiro · Inventors: Nakaoku, Shozo; Sakuma, Kazuhiko; Oshika, Yasuhiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides an indene compound represented by the following general formula (I): (I), wherein R1 means a lower alkyl group R2 and R3 denote, a lower alkyl group individually or an alkylenedioxy group in combination, and R4 and R5 mean individually a substituted or unsubstituted lower alkyl or aryl group or in combination a substituted or unsubstituted piperidino, piperazinyl or homopiperazinyl group together with the adjacent nitrogen atom with a, proviso that not both R4 and R5 are a methyl group at the same time. The compounds of this invention have the ability to increase coronary blood flow and thus are useful as therapeutic agents for angina pectoris.
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
- Granted June 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
- 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.