Graft copolymer and styrene based resin composition
CA 1296823 C · Owner: Takahashi, Kazuo · Inventors: Takahashi, Kazuo; Ota, Masanori; Akutsu, Fumio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Styrene based resin compositions comprise resin and a graft copolymer obtained by graft-polymerizing in, the presence of a butadiene based rubbery polymer a, monomer mixture composed of a monomer containing 1-50 ethylene oxide groups and one ethylenically-unsaturated bond and styrene or a monomer mixture composed of styrene as a principal component and at least one monomer copolymerizable with styrene. The styrene based resin compositions are obtained by blending the graft copolymer with the styrene resin and have excellent impact strength and visual properties.
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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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 2009.
- 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
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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.