Method for permanently shaping keratin fibres, and agents
CA 2384892 A1 · Owner: Hans Schwarzkopf Gmbh & Co. Kg. · Inventors: Knappe, Thorsten; Manneck, Hartmut; Bichels, Dirk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for permanently shaping keratin fibres whereby said keratin fibres , are treated with an aqueous preparation of a keratin-reducing substance before and/or after mechanical shaping, initially rinsed after an exposure period subsequently fixed with an aqueous preparation of an oxidizing agent rinsed , after another exposure period and optionally subjected to post-treatment. The inventive method is particularly efficient and mild acting when at least one of the two aqueous preparations or the first rinse takes the form of a twophase or multiphase system containing at least one oil ingredient and/or at least one alcohol that can only be mixed with water to a limited degree and …
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 August 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 10, 2021.
- 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.