Canadian application, no grantCanada
Biphenylamidine derivatives
CA 2310331 A1 · Owner: Takano, Yasunobu · Inventors: Nakada, Tomohisa; Tsutsumi, Takaharu; Takazawa, Yoshiharu
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Biphenylamidine derivatives represented by general formula (1) or pharmaceutically acceptable salts thereof both being novel compounds , functioning as clinically applicable Fxa inhibitors.
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 November 19, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 19, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 19, 1998
GrantedNo grant recorded
Term endedNovember 19, 2018
Patent numberCA 2310331 A1
Classification (IPC)C07C257/18 +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.