Hexahydronaphthalene ester derivatives, their preparation and their therapeutic uses
CA 2114450 A1 · Owner: Kogen, Hiroshi · Inventors: Kogen, Hiroshi; Kitazawa, Eiichi; Ishihara, Sadao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I): (I), wherein R1 represents a group of formula (II) or (III):, (II) (III), R2 is hydrogen or a group of formula -OR3; R3 R3a and R3b are each hydrogen, a hydroxy-protecting group, alkyl, alkanesulfonyl, halogenated alkanesulfonyl or arylsulfonyl; R4 is hydrogen or a carboxyprotecting group; R5 is alkyl, alkenyl alkynyl, aryl, aralkyl or a fused polycycle; and W is alkylene and their salts and esters have the ability to inhibit the synthesis of cholesterol, and can thus be used for the treatment and prophylaxis of hypercholesterolemia and of various cardiac disorders.
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 January 28, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2016.
- 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.