Carboxylic acids and isosteres of heterocyclic ring compounds having multiple heteroatoms for vision and memory disorders
CA 2336154 A1 · Owner: Gpi Nil Holdings, Inc. · Inventors: Sauer, Hansjorg; Ross, Douglas T.; Steiner, Joseph P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel compositions and uses of carboxylic acid or isostere of a heterocyclic ring compound having two or more heteroatoms within the heterocyclic ring and wherein the heterocyclic ring has at least one substituent attached thereto, the substituent selected from the group consisting of a diketo, a sulfonamide, a urea a carbamate, and substituted , derivatives thereof for treating a vision disorder or improving vision or treating memory impairment or enhancing memory performance in an animal.
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.