Surface chemistry modified latex and resdispersible powders, production and use thereof
CA 2393637 A1 · Owner: Bett, William · Inventors: Castaing, Jean-Christophe; Bett, William; D'Allest, Jean-Francois
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a surface chemistry modified latex which can be obtained by carrying out radical polymerization in emulsion in the presence of at least one ethylenically unsaturated monomer or at least one polymer having ethylinically unsaturated residual bonds at least one radical polymerization, at least one single double or triple block polymer which is soluble or dispersible in water comprising an active group at the end thereof capable of forming a radical, and chosen from dithioesters xanthates, thioether-thiones and dithiocarbamates. The invention also relates to redispersible powders which can be obtained by drying said latexes.
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 December 8, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 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.