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:
Aug. 27, 2002
Filed:
Sep. 06, 2000
Applicant:
Inventors:
Rupert Edward von Haken Spence, Calgary, CA;
Stephen John Brown, Calgary, CA;
Ryan Paul Wurz, Montreal, CA;
Dusan Jeremic, Calgary, CA;
Douglas W. Stephan, LaSalle, CA;
Assignee:
NOVA Chemicals (International) S.A., Villars-sur-Glane l, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J 3/124 ; B01J 3/138 ; C08F 4/44 ;
U.S. Cl.
CPC ...
B01J 3/124 ; B01J 3/138 ; C08F 4/44 ;
Abstract
New group 4 organometallic complexes are characterized by having a phosphinimine ligand and two or more cyclopentadienyl ligands. Certain of these complexes exhibit unusual behavior when examined by nuclear magnetic resonance (NMR) techniques. Well defined crystals of the inventive complexes have been isolated and analyzed by x-ray crystallography. The complexes have also been found to be polymerization catalysts which are surprisingly more active than their simple metallocene analogs.