Method of producing polymers and copolymers of amido- sulfonic acid containing monomers and salts thereof
CA 1268293 C · Owner: Lorentz, Richard E. · Inventors: Sopko, Thomas M.; Lorentz, Richard E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
L-2229B, Title: "A Method of Producing Polymers and Copolymers of Amido-Sulfonic Acid Containing Monomers and Salts Thereof" ABSTRACT, A method for producing homopolymers and copolymers from amido-sulfonic acid or salt containing monomers in the presence of high energy mechanical mixing utilizing a final stage polymerization temperature of from about 200°F to below the degradation temperature of the monomer. The process produces a solid homopolymer or copolymer which can be utilized as fluid loss 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
- Granted April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
- 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.