Novel anti-oxidative, tricyclic, condensed heterocyclic compound
CA 2200598 C · Owner: Jinno, Shuji · Inventors: Jinno, Shuji; Onuki, Hiroyuki; Okita, Takaaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel antioxidant tricyclic fused heterocyclic compound represented by general formula (2) and a salt thereof (wherein X-Y represents CH2-C=O CH2-, CH2 or CH=CH; Z represents O, S or S=O; and R1 to R8 represent each hydrogen hydroxy, halogeno, lower alkyl, lower alkoxy lower alkyl ketone or CF3, provided at least two groups among R1 R2, R3 and R4 represent each hydroxy). This compound has an antioxidant activity at least equivalent to that of .alpha.-tocopherol, and so is promising as a remedy for various diseases wherein in vivo lipid peroxides participate such as cancer, arteriosclerotic , diseases and liver diseases. It is also expected to be applicable to the preparation 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 September 28, 1995 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 2017.
- 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.