Propylene resin composition and method for producing the same
CA 2327487 A1 · Owner: Saeki, Takashi · Inventors: Mitsuhashi, Kenichi; Nakashima, Hiroki; Sugita, Yasuhisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A propylene resin composition comprising 100 parts by weight of two propylene polymers having specific properties, 0 to 50 parts by weight of a specific elastomer, and 0 to 50 parts by weight of an inorganic filler; and a production process in which two polymers comprising one or more kinds of propylene polymers are melt-kneaded in the following manner. When the difference in viscosity between a propylene homopolymer part forming a base polymer and an amorphous propylene part forming a dispersed phase is small one of the polymers is melt-kneaded, before the other is directly added thereto and the mixture is melt-kneaded. When the viscosity difference between those is large, the …
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 March 23, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2022.
- 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.