Method for producing filler-containing colored thermoplastic resin composition
CA 2000542 C · Owner: Fujii, Takeshi · Inventors: Mitsuno, Tatsuyuki; Hori, Shinichi; Fukuda, Katsuyasu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing a filler-containing colored thermoplastic resin composition (F) comprises melt kneading a filler (C) with at least a part of components of resin consisting of polypropylene and/or a thermoplastic resin composition (B) comprising polypropylene (A) and ethylenepropylene copolymer rubber (H), ethylene-propylene-nonconjugated diene copolymer rubber (I) or ethylene-butene-1copolymer rubber (J), adding remainder of the resin if, any, with a pigment (E) to the mixture and then further, carrying out melt-kneading.
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 October 12, 1989 and granted May 21, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 12, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2011.
- 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.