Therapeutic agent for bladder hypersensitivity
CA 2442468 A1 · Owner: Ohno, Tetsuji · Inventors: Yamagata, Tsuyoshi; Ohno, Tetsuji; Shirakura, Shiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Remedies for vesical hyperesthesia which contain as the active ingredient tricyclic compounds represented by the following general formula (I) or pharmacologically acceptable salts thereof: (I) wherein R1 represents hydrogen, optionally substituted lower alkyl etc.; X1-X2-X3 represents , CR5=CR6-CR7=CR8 CR5=CR6-S, etc.; Y represents -CH2S-, SOCH2 etc.; and R2 , represents hydrogen, etc.
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 29, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 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.