Cosmetic compositions containing block copolymers
CA 2362579 A1 · Owner: Graves, Gary G. · Inventors: Montes De Oca, Margarita; Graves, Gary G.; Norman, Greg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject-matter of the present invention is a transfer-free composition comprising (a) at least one of a di-block tri-block, multi-block and/or , radial block copolymer and optionally (b) a film former or a mixture of film formers. The composition may comprise any one of a di-block tri-block, multi-, block or radial block copolymer or any mixture or blend of co-polymers. Cosmetic and pharmaceutical compositions of the invention result in a film with very good retention, good transfer resistant properties and which does , not migrate over time. The compositions have cosmetic properties which are improved in relation to those of the "transfer free" products of the prior art.
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 24, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 24, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 24, 2022.
- 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.