Expired Canadian patentCanada
Process for the preparation of substituted pyridines
CA 1264754 C · Owner: Lysenko, Zenon · Inventors: Pews, Richard Garth; Lysenko, Zenon
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted pyridines are prepared by the base and transition metal catalyzed ring closure of substituted 5-oxo-pentane-1-nitriles.
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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 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.
FiledJanuary 9, 1984
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264754 C
Classification (IPC)C07D213/61
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.