Preparation of finely divided pulverulent crosslinked copolymers
CA 1329678 C · Owner: Basf Aktiengesellschaft · Inventors: Hartmann, Heinrich; Denzinger, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure: Pulverulent crosslinked copolymers are prepared by polymerizing monomer mixtures consisting of, (a) from 70 to 99.99% by weight of monoethylenically unsaturated carboxylic acids their amides and/or esters of such carboxylic acids and aminoalcohols (b) from 0.001 to 10% by weight of a diethylenically or polyethylenically unsaturated monomer and (c) from 0 to 20% by weight of other monoethylenically unsaturated monomers, in supercritical carbon dioxide under superatmospheric pressure in the presence of a free radical initiator.
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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 May 17, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 17, 2011.
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Timeline
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.