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. 27, 2012
Filed:
Dec. 10, 2008
Martin Anker, Hisings Kärra, SE;
Siw Bodil Fredriksen, Skien, NO;
Pal Christian Bentzrod, Stavern, NO;
Mats Bäckman, Göteborg, SE;
Leif Leiden, Andersböle, FI;
Markku Vahteri, Porvoo, FI;
Petri Rekonen, Porvoo, FI;
Martin Anker, Hisings Kärra, SE;
Siw Bodil Fredriksen, Skien, NO;
Pal Christian Bentzrod, Stavern, NO;
Mats Bäckman, Göteborg, SE;
Leif Leiden, Andersböle, FI;
Markku Vahteri, Porvoo, FI;
Petri Rekonen, Porvoo, FI;
Borealis Technology OY, Porvoo, FI;
Abstract
The present invention deals with coated pipes having a layer of multimodal polyethylene. The multimodal ethylene copolymer is a copolymer of ethylene with one or more alpha-olefin comonomers having from 4 to 10 carbon atoms and has a weight average molecular weight of from 70000 g/mol to 250000 g/mol and a melt index MFRof from 0.05 g/10 min to 5 g/10 min, a melt index MFRof from 0.5 to 10 g/10 min and a density of from 945 kg/mto 958 kg/m. The coatings have a high stiffness, good properties at elevated temperatures and acceptable stress-cracking properties.