Novel heterocyclic derivatives useful in treating central nervous system disorders
CA 2305342 A1 · Owner: Mccomsey, David · Inventors: Maryanoff, Bruce E.; Nortey, Samuel O.; Mccomsey, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a series of substituted 3-oxo-pyrrolo1,2- <u>a</u>imidazopyridine derivatives of formula (I) where X1-X4 R1, R2 and Ar , are defined herein. In addition the invention relates to pharmaceutical compositions containing them and intermediates used in their manufacture. The compounds of the invention are ligands for the benzodiazepine site on the GABA- A receptor and display anxiolytic and anticonvulsant activity in animal models.
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 October 5, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 5, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2020.
- 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.