Process for the continuous bulk production of acrylic polymers
CA 2042836 C · Owner: Airaghi, Fortunato · Inventors: Airaghi, Fortunato; Relvini, Pasquale
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the continuous bulk production of acrylic polymers which comprises:, a. continuously feeding a polymerization reactor with a reaction mixture containing at least a polymerization adjuvant selected from solvents of the acrylic polymer preferably from the C1-C10 alkyl esters of organic acids R-COOH, wherein radical R represents a hydrogen atom or an alkyl radical containing from 1 to 6 carbon atoms b. partially converting the_reaction mixture at high temperature, and, C. devolatilizing the partially converted polymer at high temperature and reduced pressure.
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
- Filed May 17, 1991 and granted August 27, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2013.
- 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.