Thienopyridine derivatives, their production and use
CA 2397165 A1 · Owner: Yasuma, Tsuneo · Inventors: Aoki, Isao; Nagata, Toshiaki; Yasuma, Tsuneo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides thienopyridine derivatives which are useful as , anti-inflammatory drugs particularly as remedies for arthritis; processes for producing them, and pharmaceutical compositions containing them. The thienopyridine derivatives are represented by the formula (I) wherein G is a , halogen atom, hydroxyl group an optionally substituted amino group, etc.; alk is an optionally substituted lower alkylene group; X is O S, -(CH2)q-, etc.; , R is an optionally substituted amino group etc.; ring B is an optionally , substituted Y-containing 5- to 8-membered ring whose ring constituent atoms contain no nitrogen atom; Y is O, S, a group of formula (II) (wherein Ra Rb , and …
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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 February 28, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 28, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 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.