Process for preparing polyolefins
CA 1185748 A · Owner: Nippon Oil Co. Ltd. · Inventors: Kuroda, Nobuyuki; Miyoshi, Mituji; Matsuura, Kazuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Olefins are polymerized in the presence of a catalyst which comprises the combination of:, I a solid substance obtained by the reaction of at least the following two components:, (i) a magnesium compound represented by the general formula R1m(OR2)nMgX2-m-n wherein R1 and R2 are each a hydrocarbon radical having 1 to 24 carbon atoms X is a halogen atom, n is 0 ? m ? 2 and n is 0 ? n ? 2, provided 0 ? m+n ? 2, and, (ii) a titanium compound and/or a vanadium compound; II a silicon compound represented by the general formula wherein R3, R4 and R5 are each a, hydrocarbon radical having 1 to 24 carbon atoms alkoxy, hydrogen, or halogen, R6 is a hydrocarbon radical having 1 to 24 carbon atoms and …
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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 April 16, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2002.
- 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.