2,5-pyrrolidinedione derivatives useful as antiarrhythmic agents
CA 1270833 C · Owner: Chorvat, Robert John · Inventors: Desai, Bipinchandra Nanubhai; Chorvat, Robert John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention encompasses compounds of the formula and pharmaceutically acceptable acid addition salts thereof,wherein n is 2 or 3 and R1 and R2 are n-propyl, isopropyl, or R1 and R2 together with N form a 2,6-dimethyl-1-piperidinyl group, which are useful as antiarrhythmic agents.
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 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 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.