Sal olein, a process for its preparation and cosmetic compositions containing it
CA 2035656 C · Owner: Wille, Hans-Juergen · Inventors: Mottier, Line; Wille, Hans-Juergen; Viret, Jean-Louis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To avoid problems affecting the physicochemical stability of cosmetic products containing sal fat the sal, fat is subjected to fractional crystallization with n-hexane to obtain an olefin in the form of a clear liquid at ambient temperature. The olefin obtained is suitable for the preparation of cosmetic compositions in the form of aqueous or anhydrous emulsions which retain a smooth and lustrous appearance while showing the qualities of sal fat.
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 February 4, 1991 and granted April 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 2013.
- 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.