Thermoplastic resin composition
CA 2035827 A1 · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Fujii, Takeshi; Yamamoto, Masashi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The thermoplastic resin composition of the present invention contains, (a) a resin composition consisting of (1) at least one polypropylene resin (E) selected from the group consisting of, (i) a graft polypropylene (A) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof onto a polypropylene (C) (ii) a graft polypropylene (B) obtained by graft polymerizing an unsaturated carboxylic acid or a derivative thereof and an unsaturated aromatic monomer onto a polypropylene (C) (iii) a composition (D) selected from the group consisting of, a composition of a polypropylene (C) and the graft polypropylene (A), a composition of a polypropylene (C) and the graft …
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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 February 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2013.
- 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.