Propylene polymer compositions
CA 2295395 C · Owner: Kawasaki, Masaaki · Inventors: Fukuoka, Daisuke; Mizuno, Akira; Ueda, Takasi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a propylene polymer composition comprising (A5) 5-95 wt. % of propylene homopolymer obtained by polymerizing propylene in the presence of a catalyst comprising (i) a transition metal compound of the formula: (see formula I) (wherein M is a transition metal R1 is hydrocarbon, R2 is aryl, X1 and X2 are hydrogen halogen, hydrocarbon or the like and Y is a divalent group such as hydrocarbon) and (ii) an organoaluminium oxy-compound or the like and 95-5 wt. % of at least one other ingredient selected from another propylene polymer an olefin elastomer and another olefin polymer. The composition may be used for molding articles.
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 January 11, 1994 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 11, 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.