Imidazol derivatives, process for their preparation and their applications
CA 2092309 A1 · Owner: Rhone-Poulenc Rorer Limited · Inventors: Lythgoe, David John; Harris, Neil Victor; Bridge, Andrew William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Imidazole derivatives of the formula (I): DPIM-X-Z-Y wherein DPIM is a 4,5-diphenylimidazol-2-yl grouping in which the phenyl groups are optionally substituted by halogen alkyl or alkoxy, X , represents a direct bond or alkylene alkenylene or alkynylene of, up to 3 carbon atoms Z represents a direct bond or, when X is other than a direct bond, Z represents oxygen -O-CH2- or -NH-, and Y represents alkoxycarbonyl optionally substituted alkyl, optionally substituted phenyl or heterocyclyl or a group of, formula (II), (III), (IV) wherein m is 2, 3 or 4, p is 0, 1, 2, 3 4, or 5, q is 0 or 1, r is 1, 2, 3 or 4 provided that formulae (III), and (IV) each represents a 5- 6- or 7-membered ring, and …
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 September 25, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 25, 2013.
- 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.