Procedure for the permanent setting of hair that involves the use of amine silicones
CA 2380667 C · Owner: Devin-Baudoin, Priscilla · Inventors: Devin-Baudoin, Priscilla; Sabbagh, Anne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improvement of a process for permanently reshaping keratin fibres comprising the application to the keratin fibres before the reducing operation and/or after the fixing operation of a pre-treatment and/or post-treatment cosmetic composition comprising in a cosmetically acceptable vehicle, at least one aminosilicone microemulsion the number-average primary size of the particles in the at least one microemulsion ranging from 3 to 70 nm.
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 April 4, 2002 and granted July 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 4, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 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.