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:
Mar. 23, 2010
Filed:
Jul. 10, 2008
Applicants:
Alex S. Ionkin, Kennett Square, PA (US);
Lynda Kaye Johnson, Wilmington, DE (US);
Inventors:
Alex S. Ionkin, Kennett Square, PA (US);
Lynda Kaye Johnson, Wilmington, DE (US);
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 15/02 (2006.01); C07F 15/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
Novel iron and cobalt complexes of certain novel tricyclic ligands containing a 'pyridine' ring and substituted with two imino groups are polymerization and/or oligomerization catalysts for olefins, especially ethylene. Depending on the exact structure of the ligand, and polymerization process conditions, products ranging from α-olefins to high polymers may be produced. The polymers, especially polyethylenes, are useful for films and as molding resins.