Lightening dye with direct-dyeing colorants
CA 2458683 A1 · Owner: P&G-Clairol, Inc. · Inventors: Dousse, Christel; Gottel, Otto; Javet, Manuela
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The object of the invention is an agent for lightening and dyeing keratin fibers, said agent containing (a) an oxidant and (b)at least one yellow directdyeing colorant of formula (I) and/or a red direct-dyeing colorant of formula , (II) and/or a blue direct-dyeing colorant of formula (III) in addition to , (c) a basic pH value. The invention also relates to a method for dyeing keratin fibers.
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 13, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 2024.
- 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.