Use of salicylated derivatives for the treatment of skin aging
CA 2005695 C · Owner: L'Oreal · Inventors: Saint Leger, Didier; Leveque, Jean-Luc
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a composition intended for the treatment of ageing of the skin containing within a physiologically acceptable medium at least one salicylic acid derivative with the formula (SEE FIG. I) in which R is a saturated aliphatic chain an unsaturated chain having one or more double bonds conjugated or not the chains being replaceable by one or more halogen atoms and by trifluoromethyl groups by one or more hydroxyl groups in free state or esterified by an acid or by a carboxyl function in free state or esterified by a lower alcohol; R is a hydroxyl group or an ester function with the formula (SEE FIG. II) in which R1 is a saturated or unsaturated aliphatic 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 December 15, 1989 and granted February 10, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 15, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 2011.
- 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.