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:
Jan. 09, 2007
Filed:
Jul. 09, 2003
Girish T. Dalal, Avon Lake, OH (US);
Arthur L. Backman, Broadview Heights, OH (US);
Andrew M. Olah, Spencer, OH (US);
Theodore J. Schmitz, Avon, OH (US);
Andrew L. Auvil, Brecksville, OH (US);
Michael D. Vaughn, Strongsville, OH (US);
James J. Dedrick, Medina, OH (US);
Girish T. Dalal, Avon Lake, OH (US);
Arthur L. Backman, Broadview Heights, OH (US);
Andrew M. Olah, Spencer, OH (US);
Theodore J. Schmitz, Avon, OH (US);
Andrew L. Auvil, Brecksville, OH (US);
Michael D. Vaughn, Strongsville, OH (US);
James J. Dedrick, Medina, OH (US);
Noveon, Inc., Cleveland, OH (US);
Abstract
A multi-layered pipe of arbitrary length and cross-section is produced by co-extrusion of a lower polyolefin (C–C) outer body over the exterior surface of a tubular core of randomly, partially randomly, or blocky chlorinated lower polyolefin, the core having a wall thickness, measured in the radial direction, in the range from about 0.025 mm to 5 mm. The tubular core is coextensive with essentially the entire length of the pipe. The tubular core comprises a major proportion by weight of the randomly chlorinated polyolefin (r-CPO), or, partially randomly chlorinated polyolefin (pr-CPO), or, a blocky chlorinated polyolefin (b-CPO), any of which may be blended with a minor proportion by weight of a blending ingredient. The r-CPO, pr-CPO or b-CPO, or a blend thereof, each has an extrusion temperature in the same range as that for the corresponding non-halogenated polyolefin, namely in the range from about 150° C. to 250° C.