Propylene polymer composition
CA 2022927 C · Owner: Showa Denko K.K. · Inventors: Takada, Tomio; Suda, Tsutomu; Tajima, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A propylene polymer composition is disclosed which comprises, (A) a propylene homopolymer and/or a propyleneethylene random copolymer containing not more than 10% by weight of ethylene as a monomer unity said homopolymer and copolymer containing not more than 5% by weight of xylene-soluble matter at 30°C (B) an ethylene-propylene random copolymer containing 30 to 75% by weight of propylene as a monomer unit, containing not more than 5% by weight of xylene-insoluble matter at 30°C, .having a ratio of weight-average molecular weight to number-average molecular weight of more than 10 but less than 100 as measured by gel permeation chromatography, (C) an ethylene-propylene copolymer …
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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 August 8, 1990 and granted May 29, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2012.
- 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.