Method for producing an ethylene-based polymer
CA 1304882 C · Owner: Idemitsu Petrochemical Company Limited · Inventors: Tomotsu, Norio; Nakacho, Kenji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of the invention for producing an ethylenebased polymer is characterized by the use of a catalyst system comprising, in combination with an organoaluminum compound such as triethyl aluminum, a solid catalytic ingredient prepared by a specific procedure comprising the steps of (a) contacting a mixture composed of a magnesium dialkoxide represented by the general formula Mg(OR') 2 in, which R' is a monovalent hydrocarbon group and a tetra-, alkoxide of a metal represented by the general formula M'(OR2)4, in which M' is an atom of titanium or zirconium and R2 is a monovalent hydrocarbon group with an alkanol, to form a magnesium-containing solid complex (b) reacting, the …
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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 July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 2009.
- 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.