Process for producing ethylene polymers
CA 1162700 A · Owner: Sumitomo Chemical Company Limited · Inventors: Mashita, Kentaro; Takao, Hiroshi; Kawai, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a process for producing an ethylene polymer by the slurry-type polymerization of ethylene or ethylene and other olefins by using a catalyst system comprising a high-activity supported-type Ziegler catalyst component (hereinafter referred to as solid catalyst component) and an organometallic compound component in the presence of hydrogen as molecular weight regulator in two or more reaction zones connected in series and kept full with the liquid phase to exclude the gas phase the, improvement which comprises using a solid catalyst component of long-lasting high-activity and limiting the average amount of polymer formation in each reaction zone within a specific range. According to 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 February 21, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 21, 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.