Interphenylene 7-oxabicycloheptyl substituted heterocyclic amide prostaglandin analogs useful in the treatment of thrombotic and vasospastic disease
CA 2012267 C · Owner: Misra, Raj Narain · Inventors: Misra, Raj Narain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Interphenylene 7-oxabicycloheptane, substituted prostaglandin analogs are provided which are useful in treating thrombotic and vasospastic disease and have the structural formula wherein m is 1, 2 or 3;, n is 0, 1, 2, 3 or 4; Y is 0, vinyl or a single bond, with the proviso that when n is 0, Y is a single bond; R is CO2H, CO2alkali metal, CO2 lower alkyl CH2OH, CONHSO2R3, CONHR3a or 5-tetrazolyl with the, proviso that when R is 5-tetrazolyl n is other, than 0;, X is O, S or NH;, R1 is hydrogen lower alkyl, lower alkenyl, lower alkynyl aryl, aralkyl, cycloalkyl, cyclo-alkylalkyl saturated heterocycle, saturated, heterocyclicalkyl aromatic heterocycle, aromatic, heterocyclicalkyl or amido; …
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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 March 15, 1990 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2012.
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