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:
Jul. 18, 2017
Filed:
Sep. 24, 2014
Borealis Ag, Vienna, AT;
Thomas Hjertberg, Kungshamn, SE;
Ravindra Tupe, Maharashtra, IN;
Udo Wahner, Linz, AT;
Tanja Piel, Linz, AT;
Yi Liu, Engerwitzdorf, AT;
Alexandra Romina Albunia, Linz, AT;
Floran Prades, Linz, AT;
Joseph Thorman, Helsinki, FI;
Dusan Jeremic, Linz, AT;
BOREALIS AG, Vienna, AT;
Abstract
A process for polymerizing ethylene in the presence of a polymerization catalyst by copolymerizing ethylene with a comonomer selected from the group of C4-C10 alpha-olefins in three polymerization stages. The polymers produced in the three stages have different melt flow rates. The polymer composition produced by the process has good mechanical properties and can be used for making pipes. The process has a good productivity and provides a stable and economic operation.