Proline derivatives and use thereof as drugs
CA 2418656 C · Owner: Akahoshi, Fumihiko · Inventors: Hayashi, Yoshiharu; Sakashita, Hiroshi; Kitajima, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention aims at providing compounds which exhibit therapeutic effects through the inhibition of DPP-IV and are satisfactory as drugs. The invention has been accomplished by finding that .gamma.-substituted proline derivatives of the general formula (I) exhibit potent DPP-IV inhibitory activities and improving the same in stability. In the general formula each symbol is as , defined in the description.
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
- Filed August 10, 2001 and granted February 1, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 10, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2023.
- 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.