Weakly acidic crosslinked vinyl polymer particles and coating compositions and electrographic elements and developers containing such particles
CA 1285693 C · Owner: Nair, Mridula · Inventors: Nair, Mridula
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The invention provides new weakly acidic crosslinked vinyl polymer particles having utility as components of coating compositions, liquid electrographic developers, and layers of electrographic elements and records. Each of the polymeric particles of the invention has a weakly acidic surface and an average diameter less than one micrometer and comprises a crosslinked vinyl addition copolymer obtainable by aqueous emulsion polymerization of a mixture of monomers in the presence of a polymerization initiator, wherein:, 0.5-15 percent by weight of the mixture of monomers comprises polyfunctional vinyl addition-polymerizable monomers in order to form crosslinking structural units in …
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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 2008.
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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.