Expired Canadian patentCanada
Retinoid replacements and opsin agonists and methods for the use thereof
CA 2518655 C · Owner: University Of Washington · Inventors: Saperstein, David A.; Palczewski, Krzysztof
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compositions of and methods for using synthetic retinoids as retinoid replacements and opsin agonists are provided.
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 March 15, 2004 and granted June 9, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 15, 2004
GrantedJune 9, 2015
Term endedMarch 15, 2024
Patent numberCA 2518655 C
Classification (IPC)A61K31/11 +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.