Method for manufacture of pigment-containing cosmetic compositions
CA 2276030 C · Owner: Huggins, Nicole B. · Inventors: Shah, Amit R.; Huggins, Nicole B.; Orr, Carl C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a pigment composition comprising a pigment treated with a water-dispersible polyester or polyesteramide polymer in the absence of added water. The invention also relates to a method grinding a mixture containing of a pigment with a water-dispersible polyester or polyesteramide in the absence of added water. Such pigment compositions are particularly useful as the colorant in cosmetic compositions.
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 October 26, 1998 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 26, 2020.
- 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.