New derivative of kojic acid and its use as a depigmenting agent
CA 2210365 C · Owner: Pichaud, Patrick · Inventors: Pichaud, Patrick; Galey, Jean-Baptiste
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a new derivative of kojic acid with formula (I), and its use in a composition for topical application as a depigmentation and/or whitening agent for human skin (see fig I). The invention further concerns a procedure for depigmenting and/or whitening human skin by applying to the skin a composition containing in a physiologically acceptable medium 2-oxo-thiazolidine-4-carboxylate of 5-hydroxy-4-oxo-4H-pyran-2yl-methyl of formula (I).
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 July 17, 1997 and granted January 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2019.
- 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.