Copolymers as thickeners and modifiers for latex systems
CA 1297124 C · Owner: Wilkerson, John M. Iii · Inventors: Swope, Ronald L.; Barron, Milagros Cordero; Wilkerson, John M. Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thickened aqueous copolymer solution useful for thickening and improving the properties of latex systems comprising a copolymer having as monomeric units: about 79-99 percent of a (meth)acrylic acid salt of sodium, potassium, or ammonium; about 0-20 percent of (meth)acrylic acid; about 0-20 percent of a lower alkyl ester of (meth)acrylic acid; about 1-21 percent of surfactant units selected from the reaction product of a monoethylenically unsaturated monoisocyanate with a nonionic surfactant having hydroxyl or amine functionality; or an ester of a monoethylenically unsaturated dicarboxylic acid with a, polyoxalkylene alkyl ether or a polyoxyalkylene sorbitan ester, and about 0-1 percent …
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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
- Granted March 10, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 2009.
- 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.