Sulfonamides of n-containing heterocyclic thioesters for vision and memory disorders
CA 2336148 A1 · Owner: Hamilton, Gregory S. · Inventors: Steiner, Joseph P.; Ross, Douglas T.; Sauer, Hansjorg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to pharmaceutical compositions and methods for treating a vision disorder, improving vision, treating memory impairment or enhancing , memory performance using N-linked sulfonamides of heterocyclic thioesters. 3- (para-Methoxyphenyl) -1-propylmercaptyl (2S)-N-(benzenesulfonyl)pyrrolidine-2carboxylate; 3-(para-Methoxyphenyl)-1-propylmercaptyl (2S)-N-(toluenesulfonyl)pyrrolidine-2-carboxylate and 1,5-Diphenyl-3-pentylmercaptyl , N-(paratoluenesulfonyl)pipecolate are specifically claimed.
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 August 12, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2021.
- 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.