Novel intermediates for use in retinoid synthesis
CA 2427043 C · Owner: Cartier, Dominique · Inventors: Cartier, Dominique; Potier, Pierre Jean-Paul; Valla, Alain
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 (1) wherein in particular G represents the -N(CH?3?)?2?- -N(C?2?H?5?)?2?-group or N-pyrrolidine; n is an integer equal to 1 or 2; R?1? R?2? and R?3?, independently of one another represent a hydrogen atom or a methyl group the successive unsaturated units capable of being moreover identical or different provided that at least one of the substituents R?1? R?2? and R?3? is different from H; and Y?1? and Y?2? represent each a -COOCH?3? group or a -COOC?2?H?5? group.
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 26, 2001 and granted December 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 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.