Propylene polymer compositions
CA 2128920 C · Owner: Mitsui Chemicals, Inc. · Inventors: Zenitani, Yurimasa; Yamaguchi, Masayoshi; Yamamoto, Akihiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The propylene polymer composition of the invention comprises, as its essential components a specific, propylene polymer A described below and a propylene block copolymer B. In addition to the propylene polymer A and the propylene block copolymer A, the propylene polymer composition may contain a thermoplastic elastomer C selected from, polystyrene polyethylene/poybutylene polystyrene block copolymers and ethylene/.alpha.-olefin random copolymers or may, further contain an inorganic filler D. The propylene polymer A used in the invention has the following characteristic properties: (1) a boiling heptane-insoluble component is contained in said polymer in an amount of not less than 96 % by …
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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 July 27, 1994 and granted June 1, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2016.
- 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.