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:
Apr. 09, 2013
Filed:
May. 21, 2002
Cecilia Rydin, Oedsmal, SE;
James Mcgoldrick, Marchtrenk, AT;
Tony Lindstroem, Bleket, SE;
Siegfried Liedauer, Wilhering, AT;
Cecilia Rydin, Oedsmal, SE;
James McGoldrick, Marchtrenk, AT;
Tony Lindstroem, Bleket, SE;
Siegfried Liedauer, Wilhering, AT;
Borealis Technology Oy, Porvoo, FI;
Abstract
Polyolefin coated steel pipes with high dynamic fracture toughness of the coating of the steel pipes during installation handling and in service, consisting of a steel pipe core, optionally an intermediate foamed plastic material, and a polyolefin coating of β-nucleated propylene copolymers whereby a test polyolefin pipe fabricated from the β-nucleated propylene copolymer has a critical pressure of >25 bars and a dynamic fracture toughness >3.5 MNm. The polyolefin coated steel pipes are suitable for off-shore transport of crude oil or gas products or district heating applications.