Keratinous fibre oxidation dyeing composition containing a laccase and dyeing method using same
CA 2318328 A1 · Owner: Cotteret, Jean · Inventors: Cotteret, Jean; Lang, Gerard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a ready-to-use composition for oxidation dyeing of keratinous fibres and in particular human keratinous fibres such as hair comprising in a suitable dyeing medium, at least an oxidation base 2-amino 3 hydroxy pyridine as coupling agent and at least an enzyme such as laccase as well as the method using said composition.
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 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2020.
- 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.