Fused 1,2,5-oxadiazole-2-oxides
CA 2098058 A1 · Owner: Bohn, Helmut · Inventors: Bohn, Helmut; Schonafinger, Karl; Brendel, Joachim
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to fused 1,2,5-oxadiazole-2oxides of the general formula I, I, in which A denotes -(CH2)n-Y- , -CH2-Z-CO-, or , wherein R1 is for example COOH, R2 and R3 are, for example, a (C1-C6)-alkyl and X, Y and Z are, for example, -S-. The compounds of the formula I have useful pharmacological properties and can be used for the control and prevention of disorders of the cardiovascular system, in particular for the control and prevention of angina pectoris and for the treatment of erectile dysfunctions.
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 9, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 9, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 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.