Tricyclic heterocyclic compounds, their production and use
CA 2052287 A1 · Owner: Takeda Chemical Industries, Ltd. · Inventors: Ikeda, Hitoshi; Tawada, Hiroyuki; Meguro, Kanji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
24205-904, Tricyclic Heterocyclic Compounds Their Production and Use, Abstracts of the disclosure Novel heterocyclic compound of the general formula:, wherein ring A and ring B each means a benzene ring which is substituted or unsubstituted; X means a group of the formula:, - wherein R2 is hydrogen an alkyl or an alkoxy;, m is 0 or 1, the formula: - wherein R3 is hydrogen or an alkyl, or the formula: -O-CO-; Y means a bond, -NH-, an C1 or 2 alkylene group or -CH=CH-; R1 means a hydrocarbon group which is substituted or unsubstituted; and n means an integer of 3 through 6, or a salt thereof having, excellent acyl-CoA.cholesterol acyltransferase inhibitory activity, and a method for preparing …
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 26, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2013.
- 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.