Novel associative polymer and process for their preparation by inverse emulsion polymerization
CA 2243535 A1 · Owner: Collette, Christian · Inventors: Corpart, Jean-Marc; Candau, Francoise; Collette, Christian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel associative acrylic polymers were produced by inverse emulsion radical polymerization. These polymers contain a special acrylic monomer. It is a methacrylic ester the radical of which is comprised of a hydrophilic segment and a hydrophobic segment. The associative polymers of the invention can be used as thickening agents flocculants or charge retention agents.
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 August 13, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 13, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 13, 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.