Finely divided gelled polymer and process for producing the same
CA 1330134 C · Owner: Hiraki, Tadayoshi · Inventors: Hiraki, Tadayoshi; Yamamoto, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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A finely divided gelled polymer obtained by emulsion polymerizing, (a) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in the molecule, and, (b) a radically polymerizable unsaturated monomer other than the one mentioned in (a), above, in the presence of a reactive emulsifier containing an allyl group in the molecule. A process for producing a finely divided gelled polymer which comprises emulsion polymerizing (a) a polymerizable monomer containing at least two radically polymerizable unsaturated groups in the molecule, and, (b) a radically polymerizable unsaturated monomer other than the one mentioned in (a) above, in the presence of a reactive …
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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 June 7, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 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.