Method for the controlled radical polymerisation of acrylic acid and the salts thereof, polymers thus obtained and applications thereof
CA 2493395 C · Owner: Coatex S.A.S. · Inventors: Suau, Jean-Marc; Egraz, Jean-Bernard
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 method for the controlled radical polymerisation of acrylic acid and the salts thereof in a reaction medium consisting only of water. The invention also relates to the acrylic acid homopolymers and copolymers obtained using said polymerisation method. The invention further relates to the use of the aforementioned acrylic acid homopolymers and copolymers in industries such as paper and in particular, paper coating and paper filling the oil sector and in the fields of painting water treatment, detergency, ceramics, cements and hydraulic binders civil engineering, inks and varnishes, textile sizing and leather finishing.
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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 July 24, 2003 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 2025.
- 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
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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.