4-substituted isoquinolone derivatives, their production and use
CA 2028538 A1 · Owner: Takeda Chemical Industries, Ltd. · Inventors: Natsugari, Hideaki; Ikeda, Hitoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound of the formula (I): wherein X is -CH2-CH2- or -CH=CH-, Y is or , Z is an oxygen or sulfur atom, R1 and R2 are independently a hydrogen atom an, optionally substituted hydrocarbon group or an optionally substituted heterocyclic group and ring A is an optionally substituted 6-membered homocyclic ring, or its ester or salt which is useful as an inhibitory agent for the biosynthesis of the cholesterol.
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 October 25, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2012.
- 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.