Novel heterocyclic derivatives, preparation method and pharmaceutical compositions containing same
CA 2398674 A1 · Owner: Blanc-Delmas, Elodie · Inventors: Depreux, Patrick; Dacquet, Catherine; Blanc-Delmas, Elodie
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns compounds of formula (I) wherein: X represents an oxygen or sulphur atom or a CH2 or (1) group; R<1> and R<2> represent a hydrogen atom or a group such as defined in the description; A represents an alkylene chain as described in the description; B is such as defined in the description; R<3> and R<4> represent a hydrogen atom or a group as defined in the description; D represents a benzene pyridine, pyrazine, pyrimidine or pyridazine ring optionally substituted.
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 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 2023.
- 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.