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:
Aug. 14, 2007
Filed:
Jul. 11, 2003
Carl M. Mahabir, Streetsboro, OH (US);
Arthur L. Backman, Broadview Heights, OH (US);
Girish T. Dalal, Avon Lake, OH (US);
Carl M. Mahabir, Streetsboro, OH (US);
Arthur L. Backman, Broadview Heights, OH (US);
Girish T. Dalal, Avon Lake, OH (US);
Lubrizol Advanced Materials, Inc., Cleveland, OH (US);
Abstract
Pipe or tubing of crosslinked polyethylene ('PEX') containing less than 2% by wt. carbon black provides improved resistance to oxidizing agents such as chlorine and hypochlorous acid in water. The pipe may be further protected with a thin tubular core (inner layer) of high density polyethylene or chlorinated polyethylene. The pipe may optionally have an oxygen barrier layer, such as poly(ethylene-co-vinyl alcohol) ('EVOH'), contiguously disposed radially outward from the carbon-containing PEX layer. The pipe is suitable for potable water applications and for hot water radiant heating systems.