Process for preparing polyolefins
CA 2122065 C · Owner: Nippon Mitsubishi Oil Corporation · Inventors: Sano, Akira; Matsuura, Kazuo; Shimizu, Hiroyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An olefin polymerization is conducted in the presence of a catalyst comprising a solid catalyst component and an organometallic compound, said solid catalyst component being prepared by reacting the following components I, II and III, with one another: I a reaction product obtained by reacting the following components (1), (2) and (3) with one another in the presence of a compound represented by the general formula R2OH where R2 is a hydrocarbon group having 1 to 20 carbon atoms:, (1) a silicon oxide and/or an aluminum oxide (2) a reaction product obtained by the reaction of a magnesium halide and a compound represented by the general formula Me(OR)n X z-n where Me represents an element of …
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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 April 25, 1994 and granted November 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 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.