Cyclicamino-phenyl sulfamate derivatives
CA 2526540 C · Owner: Takegawa, Shigehiro · Inventors: Takegawa, Shigehiro; Okada, Makoto; Koizumi, Naoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides cyclicamino-phenyl sulfamate derivatives represented by a formula, (see formula I) wherein each of R1 and R2 stands for hydrogen or lower alkyl; each of R3 and R4 stands for hydrogen halogen, cyano or , the like; A stands for nitrogen or CH; B stands for CH2 SO2, CO, optionally substituted phenyl or the like; and R5 stands for alkyl, phenyl, amino or the like, or salts thereof which exhibit excellent steroid sulfatase inhibitory activity and are useful for prevention or treatment of diseases associated with steroids such as estrogen androgen and 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 May 7, 2004 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 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.
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.