Hair cosmetic material
CA 2076322 C · Owner: Nippon Unicar Company Limited · Inventors: Tsubaki, Suguru; Noda, Isao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hair set retaining cosmetic material comprising a polymer complex prepared by (1) reacting an amino group containing polysiloxane having the formula:, AmR3-mSiO(R2SiO)x(QRSiO)ySiR3-nAn wherein A is selected from the group consisting of a hydroxyl group, an alkoxy group, and an amino group containing alkylether group; R is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms and a hydroxyl group; Q represents an amino containing alkyl group; m and n each represent a number of 0 to 3; x represents a number of 30 to 400; and y represents a number of 1 to 30 with an anionic group containing polymer; and (2) neutralizing a reaction product of step (1) with an …
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 19, 1992 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 19, 2014.
- 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.