Polyacrylate copolymer, polyacrylate dispersion comprising the polyacrylate copolymer, and process for preparing the same
CA 2025467 C · Owner: Hercules Incorporated · Inventors: Craig, Daniel H.; Goldy, Harry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An acrylate copolymer comprising repeating units derived from an acrylic or methacrylic ester monomer about 0.1 to, 3%, based on the weight of the total copolymer of repeating, units derived from from a water-soluble monomer having conjugated unsaturation, and about 0.1 to 3% also based on, the weight of the total copolymer of repeating units derived, from a water-soluble allyl monomer; aqueous polyacrylate dispersions comprising the copolymer; and a process of preparing the the copolymer.
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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 September 17, 1990 and granted July 24, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2012.
- 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.