Olefin polymerization catalyst component
CA 2032508 C · Owner: Tonen Corporation · Inventors: Imai, Masafumi; Furuhashi, Hiroyuki; Murata, Masahide
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the present invention, there is the provision of a catalyst component of metal oxide support type which has a high catalytic activity, that is a little, catalyst residue in a polymer as well as improved catalytic, grain strength sufficient for practical use and which hardly deteriorates even after storage for a long time. The feature of the present invention of consists in a catalyst component for the polymerization of olefins, obtained by contacting (a) a metal oxide and, (b) a dihydrocarbyl magnesium then contacting with, (c) a compound represented by the general formula X1 nM(OR1)m-n wherein X1 is a hydrogen atom halogen atom or, a hydrocarbon group of 1 to 20 carbon atoms M …
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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 May 17, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 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
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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.