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:
Dec. 09, 2008
Filed:
Jan. 10, 2006
Achim Hesse, Dresden, DE;
Tony Lindstroem, Bleket, SE;
Carl-gustaf Ek, Vaestra Froelunda, SE;
Cecilia Rydin, Saevedalen, SE;
Allan Boye Hansen, Sandefjord, NO;
Achim Hesse, Dresden, DE;
Tony Lindstroem, Bleket, SE;
Carl-Gustaf Ek, Vaestra Froelunda, SE;
Cecilia Rydin, Saevedalen, SE;
Allan Boye Hansen, Sandefjord, NO;
Borealis GmbH, Schwechat-Mannsworth, AT;
Abstract
Process for producing single layer and multilayer polyolefin foam pipes with improved compression resistance having a polyolefin foam layer which consists of mixtures of modified propylene polymers having strain hardening behaviour or propylene homopolymers with a stereospecificity index >98% or propylene copolymers with a stereospecificity index of the homopolymer matrix of >96%. The polyolefin foam pipes include coated steel pipes for transporting crude oil or gas products or district heating applications, single layer pipes for insulation purposes and for non- or low-pressure applications and multilayer plastic pipes for the transportation of hot or cold fluids.