Use of procysteine as a depigmentation agent
CA 2193520 C · Owner: L'Oreal · Inventors: Marrot, Laurent; Galey, Jean-Baptiste; Schmidt, Rainer
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
he invention concerns the use of L-2-oxothiazolidine-4-carboxylic acid in a composition as a skin depigmentation and/or whitening agent. It also comprises a skin depigmentation and/or whitening process which consists in applying on the skin a composition containing L-2-oxothiazolidine-4-carboxylic acid.
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 19, 1996 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2018.
- 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.