Direct capillary dyeing composition comprising a cross-linked polymer with acrylic and alkyl c10-c30 acrylate units
CA 2239104 A1 · Owner: Maubru, Mireille · Inventors: Maubru, Mireille
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention discloses a capillary dyeing composition comprising at least one direct dye characterised in that it further contains a cross-linked polymer with acrylic units and alkyl C¿10?-C¿30? acrylate units. The invention also discloses the use of a cross-linked polymer with acrylic units and alkyl C¿10?-C¿30? acrylate units in or for the production of a capillary dyeing composition comprising at least one direct dye to improve the tinctorial power of the said composition particularly after storage at below about 10 ·C and in particular at about 4 ·C. The invention also discloses a method for preserving the tinctorial power in particular after storage at a tempature below about 10 ·C of …
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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 20, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2019.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.