The use of esterquats as emulsifiers for the production of formulations for coloring keratin fibers
CA 2303209 A1 · Owner: Warner-Jenkinson Europe Ltd. · Inventors: Mcloughlin, Francis; Lawrence, Jacqueline; Pengilly, Roger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of ester quaternaries as emulsifiers for hair colorants for producing preparations for coloring keratin fibers. The invention provides an improved receptivity for color in the hair while at the , same time, the hair is given an improved soft touch during coloring.
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 May 2, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 2, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 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.