3-(bis-substituted phenylmethylene)oxindole derivatives
CA 2214744 C · Owner: Asao, Tetsuji · Inventors: Hagiwara, Yuichi; Kitade, Makoto; Sato, Atsushi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to an oxindole derivative represented by formula (1): (wherein R represents a methyl group or a methoxy group) and pharmaceuticals containing the compound. The compound exhibits excellent granulation inhibiting activity while providing minimal liver toxicity and is useful as a pharmaceutical in the prevention and treatment of articular rheumatism, arteriosclerosis, hepatocirrhosis etc. and, also in the prevention and treatment of arthrosis deformans psoriasis, gout, nephritis, angiitis, inflammatory intestinal diseases (ulcerative colitis Crohn's disease), bronchitis, and chronic granulomatosis etc.
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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 January 16, 1997 and granted December 24, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 16, 2019.
- 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.