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:
Nov. 25, 2014
Filed:
Nov. 23, 2009
Carl-gustaf Ek, Vaestra Froelunda, SE;
Hans Sandberg, Roennaeng, SE;
Siegfried Liedauer, Wilhering, AT;
James Mcgoldrick, Marchtrenk, AT;
Carl-Gustaf Ek, Vaestra Froelunda, SE;
Hans Sandberg, Roennaeng, SE;
Siegfried Liedauer, Wilhering, AT;
James McGoldrick, Marchtrenk, AT;
Borealis Technology Oy, Porvoo, FI;
Abstract
Polyolefin multilayer pipes consisting at least one of the layers of a β-nucleated propylene homopolymer and/or β-nucleated copolymers from 90.0 to 99.9% by weight of propylene and 0.1 to 10.0% by weight of α-olefins. The pipes are to be classified in ring stiffness class ≧4. The pipes are suitable for non pressure pipe applications, preferably for outdoor use, for above as well as underground drainage and sewerage pipe systems, surface water pipes, pipes for cable protection, pipes for cold climate conditions and for indoor use, soil and waste water pipes.