Dyeing composition promoting natural pigmentation, method for obtaining same and use for colouring the skin and/or keratinous fibres
CA 2394882 A1 · Owner: L'Oreal · Inventors: Pruche, Francis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a colouring composition promoting natural pigmentation the method for obtaining it and use thereof for colouring the skin and/or keratinous fibres. The composition comprises in a physiologically acceptable medium at least an enzyme having pro-pigmentation activity and an efficient amount of a catalytic system comprising a first constituent selected among the salts and oxides of Mn(II) and/or Zn(II) and their mixtures and a second constituent selected among alkaline hydrogen carbonates alkaline-earth hydrogen carbonates and their mixtures the proportions of the first and second constituents corresponding to formulae: Mn(II)/HCO¿3? <= 1 with Mn(II) 0; Zn(II)/HCO¿3? <= 1 …
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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 9, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 2023.
- 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.