Pyridyl-1,2,5-oxadiazolecarboxamide-2-oxides
CA 2097766 A1 · Owner: Schonafinger, Karl · Inventors: Bohn, Helmut; Schonafinger, Karl
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to pyridyl-1,2,5-oxadiazolecarboxamide-2-oxides of the general formula I (I), in which one of the radicals R1 and R2 represents pyridyl and the other represents, , wherein R3 and R4 independently of one another denote for, example, hydrogen, (C1-C6)-alkyl or (C5-C7)-cycloalkyl. The compounds of formula I have useful pharmacological properties and can be used in humans for the control or prevention of disorders of the cardiovascular system for example as anti-, hypertensive medicines in the various forms of high blood pressure and in the control or prevention of angina pectoris.
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 June 4, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2015.
- 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.