Bi-aromatic compounds and their use in human and veterinary medicine and in cosmetic preparations
CA 2093789 C · Owner: Centre International De Recherches Dermatologiques Galderma (Cird Galder Ma) · Inventors: Pilgrim, William Robert; Bernardon, Jean-Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bi-aromatic compounds of formula (I) wherein: Ar is either: (II) n = 1 or 2 or: (III) X is a divalent radical Z is O, S or a divalent radical, and R1 R2, R3, R4 and R5 are an hydrogen atom or different organic radicals and the salts of compounds of formula (I) when R1 is a carboxylic acid function. For use in human and veterinary medecine and in cosmetic preparations.
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 11, 1991 and granted January 1, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 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.