Proton pump inhibitor
CA 2247901 A1 · Owner: Li, Wanren · Inventors: Li, Wanren; Cappelletto, Tullio; Karimian, Khashayar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel thiadiazole compounds are provided which are effective as proton pumps , inhibitors useful in treating peptic ulcers by inhibition of the proton pump enzyme H+/K+-ATPase. The compounds are 3-substituted 1,2,4-thiadiazole 4,5abenzimidazole and 3-substituted imidazo1,2-d-1,2,4-thiadiazoles corresponding to general formula (I) where X and Z either represented an optionally substituted benzene ring fused to the diazole nucleus or represent , a variety of independent chemical groupings (hydrogen lower alkyl, halo, etc.) and Y is selected from a wide range e.g. heterocyclics and carbonyl , groups.
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 February 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2019.
- 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.