Angiotensin ii receptor blocking quinazolones
CA 2060154 A1 · Owner: American Cyanamid Company · Inventors: Levin, Jeremy I.; Venkatesan, Aranapakam M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
31,559, ANGIOTENSIN II RECEPTOR BLOCKING 2,3,6 SUBSTITUTED QUINAZOLINONES, ABSTRACT Novel quinazolinone compounds of the formula: wherein R5, R6, R7, R8, R and X are defined in the specification, which have angiotensin II (AII) antagonizing activity, intermediates useful in the preparation of the compounds, methods of producing and using the compounds to alleviate angiotensin induced hypertension and treat congestive heart failure in mammals.
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, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 28, 2014.
- 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.