Process for the preparation of 1-olefin polymers
CA 1319785 C · Owner: Dolle, Volker · Inventors: Spaleck, Walter; Antberg, Martin; Dolle, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, Process for the preparation of 1-olefin polymers A very efficient catalyst system for the polymerization of 1-olefins consists of an aluminoxane and a metallocene which is a compound of the formula I, (I) in which, R1 and R2 denote hydrogen atoms halogen atoms or hydro-, carbon radicals and R3 and R4 are mononuclear or polynuclear hydrocarbon radicals which can form a sandwich structure with the central atom and which are linked to one another by a -R3m-R5-R7n- bridge containing a hetero atom and consisting of one or several members. The catalyst system produces polymers having a high molecular weight.
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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 June 29, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 29, 2010.
- 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.