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:
May. 31, 2005
Filed:
Nov. 18, 1999
Applicants:
Carsten Bingel, Kriftel, DE;
Patrik Müller, Kaiserslautern, DE;
Hans-herbert Brintzinger, Tägerwilen, CH;
Hans-robert-hellmuth Damrau, Constance, DE;
Inventors:
Carsten Bingel, Kriftel, DE;
Patrik Müller, Kaiserslautern, DE;
Hans-Herbert Brintzinger, Tägerwilen, CH;
Hans-Robert-Hellmuth Damrau, Constance, DE;
Assignee:
Basell Polyolefine GmbH, Wesseling, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F017/00 ; C07F007/00 ; B01J031/00 ;
U.S. Cl.
CPC ...
Abstract
A process for purifying metallocenes in which a sparingly soluble metallocene halide is converted into a readily soluble and readily crystallizable metallocene by replacement of at least one halide ligand by an alternative negatively charged ligand and the metallocene obtained in this way is subsequently purified by crystallization.