Androgen receptor antagonist
CA 2471754 A1 · Owner: Kusaka, Masami · Inventors: Hara, Takahito; Kusaka, Masami; Miyazaki, Junichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Androgen receptor antagonists and excellent preventive and therapeutic drugs for hormone-dependent cancers are provided by compounds represented by the general formula ( ) or salts or prodrugs thereof: ( ) wherein R1 is hydrogen or a group bonded through a carbon, nitrogen oxygen, or sulfur atom; R2 is , hydrogen or a group bonded through a carbon nitrogen, oxygen, or sulfur atom; , R3 is hydrogen an optionally substituted hydrocarbon group acyl, or an , optionally substituted heterocyclic group; R4 is hydrogen or a group bonded through a carbon, nitrogen, oxygen, or sulfur atom; and R5 is an optionally substituted cyclic group.
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, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2024.
- 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.