Olefin polymerization catalyst and process for the polymerization of olefins
CA 2033416 C · Owner: Mitsui Chemicals, Inc. · Inventors: Ueda, Takashi; Tsutsui, Toshiyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there are, provided olefin polymerization solid catalysts comprising A a solid titanium catalyst component containing titanium magnesium and halogen as its essential ingredients said, catalyst component having supported thereon B a transition metal compound containing a ligand having a cycloalkadienyl skeleton and, if necessary C an organoaluminum oxy-compound. In accordance with the invention there are also, provided olefin polymerization solid catalysts comprising i a solid containing a transition metal compound containing a ligand having a cycloalkadienyl skeleton said solid having supported thereon, ii a titanium catalyst component containing …
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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 December 28, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2012.
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Timeline
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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.