Expired Canadian patentCanada
Pyridine compounds and pharmaceutical use thereof
CA 1339423 C · Owner: Nakajima, Tohru · Inventors: Nakajima, Tohru; Kawasaki, Kazuyuki; Ono, Yuji
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1 A novel pyridine compound of the formula wherein each symbol is as defined in the specification or a, salt thereof which exhibit inhibitory activity or prolylendo-peptidase and a pharmaceutical use thereof are disclosed.
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 September 2, 1997. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 2, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 8, 1989
GrantedSeptember 2, 1997
Term endedSeptember 2, 2014
Patent numberCA 1339423 C
Classification (IPC)C07D409/04 +2 more
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.