Process for preparing ethylene copolymers
CA 1164599 A · Owner: Mitsui Petrochemical Industries, Ltd. · Inventors: Minami, Syuji; Toyota, Akinori; Kashiwa, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing ethylene copolymers which comprises copolymerizing a predominant amount of ethylene with a minor amount of an olefin containing at least three carbon atoms, in the presence of a catalyst composed of: (A) a non-prepolymerization treated titaniumcontaining catalyst component obtained by treating a solid titanium composition (a) containing at least magnesium titanium and halogen and optionally containing less than 2 mols of an electron donor per gram-atom of the titanium with 0.1 to 10 mols of an organoaluminum compound (b) per gram-atom of titanium in said composition (a) the halogen/, aluminum (atomic ratio) in said compound (b) being not more than 1, and, (B) an …
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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 March 27, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 27, 2001.
- 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.