Stable polymer dispersions in polyoxyalkylenepolyamine
CA 2074417 A1 · Owner: Nippon Paint Co. Ltd. · Inventors: Yamamoto, Satoshi; Oshima, Toshiyuki; Ishibashi, Hideo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stable polymer dispersion in polyoxyalkylenepolyamine is provided by the in situ polymerization of at two different monomers selected respectively from (a) a first monomer capable of forming a homopolymer which does not precipitate out upon the in situ polymerization and (b) a second monomer capable of forming a homopolymer which precipitates out upon the in situ polymerization. The dispersion is useful as a raw materials of polyurea RIM forms, elastomers and other products.
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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
- Filed July 22, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2014.
- 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.