Oxidation dyeing composition for keratin fibres and dyeing method using said composition
CA 2272004 A1 · Owner: Cotteret, Jean · Inventors: Cotteret, Jean; De La Mettrie, Roland; De Labbey, Arnaud
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 oxidation dyeing composition for keratin fibres and in particular for human keratin fibres such as hair comprising in a medium appropriate for dyeing at least an oxidation base at least a direct cationic dye, and at least an oxidoreductase type enzyme with 2 electrons in the presence of at least a donor for said enzyme and the dyeing 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 September 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 28, 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.