Compound tan-1607a, its derivatives, their production and use thereof
CA 2095782 A1 · Owner: Takeda Chemical Industries, Ltd. · Inventors: Tozawa, Ryuichi; Tsubotani, Shigetoshi; Kitano, Kazuaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There are disclosed a compound of the formula (I): (I), wherein each of X1 and X2 is ethylene or vinylene each of, R1 and R2 is hydrogen or an acyl group and each of R3, R4, and R5 is hydroxyl or an optionally substituted amino group or a salt thereof; its production; and an antilipemic agent comprising it.
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 May 7, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2015.
- 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.