Substituted pyrazino (2,3-d)-pyrimidinones as angiotensin ii antagonists
CA 2079982 A1 · Owner: Merck & Co. Inc. · Inventors: Olson, Richard E.; De Laszlo, Stephen E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
356/WHN53, 360/WHN56, 18540, TITLE OF THE INVENTION SUBSTITUTED PYRAZINO2,3-DPYRIMIDINONES AS ANGIOTENSIN II ANTAGONISTS, ABSTRACT OF THE INVENTION Novel substituted pyrazino2,3-dpyrimidinones of formula (I), are angiotensin II antagonists useful in the treatment, (I), of hypertension and related disorders and in certain CNS 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 October 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.