Thermoplastic resin composition
CA 2043656 A1 · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Abe, Hiroomi; Fujii, Takeshi; Date, Shinji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The thermoplastic resin composition disclosed herein comprises:, (1) a resin composition consisting of (i) at least one member selected from the group consisting of, (a) a modified polypropylene to which has been graft copolymerized an unsaturated, carboxylic acid or the derivative thereof (b) a modified polypropylene to which have been graft comodified an unsaturated, aromatic monomer and either an unsaturated carboxylic acid or the derivative thereof (c) a mixture of the modified polypropylene (a) and a polypropylene, (d) a mixture of the modified polypropylene (b) and a polypropylene, (e) a modified mixture of a polypropylene and a rubbery substance to which mixture has been graft …
Read the whole patent
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 May 31, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 31, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 31, 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.