Pyridone derivatives having a binding activity to the cannabinoid type 2 receptor
CA 2433158 C · Owner: Shionogi & Co. Ltd. · Inventors: Hanasaki, Kohji; Iso, Yasuyoshi; Tada, Yukio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It was found that the compound having a binding activity to the cannabinoid type 2 receptor represented by the formula (I): (see formula I), wherein R1 is a group represented by the formula: -Y1-Y2-Y3-R a wherein Y1 is single , bond or the like; Y2 is -C(=O)-NH- or the like; Y3 is optionally substituted aryl or the , like; R2 is hydrogen or the like; R3 is alkyl or the like; R4 is alkyl or the like; R5 is , optionally substituted alkyl or the like; or R3 and R4 taken together with the adjacent , atom form cyclic group or the like.
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 December 26, 2001 and granted May 10, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 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.