Benzothiazole compound, production thereof and use thereof
CA 2136743 A1 · Owner: Hosono, Hiroshi · Inventors: Hase, Takema; Shimizu, Chikako; Matsui, Tetsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Production of a benzothiazole compound of the formula (I) (I), wherein R1 is a halogen atom, R2 and R3 may be the same or different and each is a hydrogen atom or a halogen atom R4 is, a hydrogen atom, a halogen atom a lower alkyl, an alkoxy or an, alkyl mercapto and R5 is a hydrogen atom or a lower alkyl or a, pharmaceutically acceptable salt thereof. The compound of the formula (I) and a pharmaceutically acceptable salt thereof of the present invention have an aldose reductase inhibitory activity in mammals inclusive of human and have superior safety. Accordingly, they are useful as pharmaceutical compositions for the treatment of the complications of diabetes, such as faulty union of …
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 25, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 25, 2016.
- 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.