The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 05, 2000
Filed:
Aug. 26, 1998
Applicant:
Inventors:
John McMeeking, Calgary, CA;
Xiaoliang Gao, Calgary, CA;
Rupert Edward von Haken Spence, Calgary, CA;
Stephen John Brown, Calgary, CA;
Dusan Jeremic, Calgary, CA;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
526161 ; 526133 ; 526170 ; 526172 ; 5263486 ; 526901 ; 526943 ; 556 32 ; 556 53 ; 502104 ;
Abstract
A catalyst system comprises an organometallic complex of a group 4 metal having a ketimide ligand. The organometallic complex preferably also contains a cyclic ligand which forms a delocalized pi-bond with the metal (such as a cyclopentadienyl-type ligand). Preferred organometallic complexes may be activated with a so-called 'substantially non coordinating anion' to form a low cost cocatalyst system which is excellent for the preparation of olefin copolymers having both high molecular weight and very low density.