Benzenesulphonamide derivatives and processes for their preparation
CA 2004199 A1 · Owner: Kerekjarto, Bela · Inventors: Hropot, Max; Granzer, Ernold; Lang, Hans-Jochen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the disclosure Benzenesulphonamide derivatives and processes for their preparation, Compounds I, I, have a diuretic saluretic and hypolipidemic action. They are obtained from II II, by reaction with an amine III, R1 - NH2 III.
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 November 29, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 29, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2011.
- 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.