PROCESS FOR POLYMERIZATION OF .alpha.-OLEFIN
CA 1293587 C · Owner: Mitsubishi Petrochemical Co. Ltd. · Inventors: Fujita, Takashi; Matsuura, Mitsuyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a process for polymerization of an .alpha.-olefin which comprises polymerizing an .alpha.-olefin in the presence of a catalyst which is a combination of a solid component (A), which is obtained by subjecting a composition (A0) comprising as the essential ingredients titanium, magnesium and a halogen to preliminary polymerization of the .alpha.-olefin conducted in the presence of said composition in a slurry and an organoaluminum compound, and an organoaluminum compound (B) said, preliminary polymerization being conducted in two steps: the first step wherein the concentration of said composition (A0) in the slurry is adjusted to 10-100 g/lit.-solvent and polymerization 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
- Granted December 24, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 24, 2008.
- 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.