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. 16, 2010
Filed:
Nov. 24, 2004
Applicants:
Pietro Baita, Occhiobello, IT;
Massimo Covezzi, Ferrara, IT;
Gabriele Mei, Ferrara, IT;
Giampiero Morini, Padua, IT;
Joachim T. M. Pater, Ferrara, IT;
Inventors:
Pietro Baita, Occhiobello, IT;
Massimo Covezzi, Ferrara, IT;
Gabriele Mei, Ferrara, IT;
Giampiero Morini, Padua, IT;
Joachim T. M. Pater, Ferrara, IT;
Assignee:
Basell Polyolefine GmbH, Wesseling, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 4/64 (2006.01); C08F 4/642 (2006.01); C08F 4/649 (2006.01); C08F 210/02 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for preparing a broad molecular weight polyethylene carried out in the presence of a catalyst system comprising (i) a solid catalyst component comprising Mg, Ti, halogen, and optionally an internal electron donor compound, and (ii) an Al-alkyl cocatalyst said process comprising at least two step of polymerization (a) and (b), in which: