Novel high molecular weight associative amphoteric polymers and uses thereof
CA 2562996 C · Owner: Gaillard, Nicolas · Inventors: Favero, Cedrick; Gaillard, Nicolas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns novel high molecular weight associative amphoteric polymers for increasing the viscosity of aqueous solutions characterized in that they comprise: at least one cationic monomer derived from acrylamide bearing at least one hydrophobic chain of 8 to 30 carbon atoms; 1 to 99.9 mole % of at least one anionic monomer; and 1 to 99 mole % of one or several non-ionic water-soluble monomers. The invention also concerns aqueous solutions containing said polymers and their uses in industry in particular the oil, paper, water treatment mining, cosmetics, textile, detergency industries and generally in all industrial techniques using thickened solutions.
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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 March 29, 2005 and granted November 26, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 29, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.