Dihydropyridine compounds
CA 1190549 A · Owner: Welfide Corporation · Inventors: Ao, Hideki; Kimura, Tomohiko; Aihara, Kenichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dihydropyridine compound of the formula: or a pharmaceutically acceptable acid addition salt thereof wherein, Het is 5- or 6-membered aromatic heteroaryl R1 and R2 are each lower, alkyl, R3 is lower alkyl R4 is hydrogen, lower alkyl or aralkyl R5 is, lower alkyl or aralkyl, and n is 1 or 2. Such compounds are useful as therapeutic agents for myocardial and cerebral ischemic syndroms and hypertension. - 1 -
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 July 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2002.
- 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.