Pyridinone derivatives as cardiotonic agents
CA 1249815 A · Owner: Warner-Lambert Company · Inventors: Sircar, Ila; Bristol, James A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel cardiotonic 2(lH)-pyridinones of general formula:, (I), methods for their preparation and use are disclosed. Wherein: X represents M F, Cl, Br, -CN or -CH2OH, -CO2R1, -CONR2R3 or -NR4R5 wherein R1 to R5, independently, represent H or C1-6alkyl and R1 additionally represents a pharmaceutically acceptable metal or amine cation; W and Y, independently, represent H or C1-6alkyl, and Z represents one of eleven amino heterocyclic or substituted heterocyclic groups.
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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 February 7, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 7, 2006.
- 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.