Expired Canadian patentCanada
Hair-growing agent
CA 2194167 C · Owner: Kawamura, Michio · Inventors: Kamiya, Toshikazu; Kobayashi, Yoshinori; Tamaoki, Tatsuya
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hair-growing agent comprising proanthocyanidin as the active ingredient. The present invention provides a hairgrowing agent having strong pharmaceutical effects.
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 June 30, 1995 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 30, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 30, 2017.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 30, 1995
GrantedDecember 30, 2003
Term endedJune 30, 2015
Patent numberCA 2194167 C
Classification (IPC)A61K8/49 +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.