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:
Nov. 15, 2016
Filed:
Mar. 09, 2007
William J. Michie, Jr., Missouri City, TX (US);
Todd A. Hogan, Sanford, MI (US);
Felipe Martinez Barreneche, Houston, TX (US);
Anthony C. Neubauer, Piscataway, NJ (US);
Stephane Costeux, Midland, MI (US);
William J. Michie, Jr., Missouri City, TX (US);
Todd A. Hogan, Sanford, MI (US);
Felipe Martinez Barreneche, Houston, TX (US);
Anthony C. Neubauer, Piscataway, NJ (US);
Stephane Costeux, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Abstract
This invention relates to coupling of polyethylene resins, more specifically coupling of polyethylene resins for use in extruded profiles, especially extruded profiles for sheet extrusion and cut sheet thermoforming applications and geomembranes. The process involves conveying a HDPE resin through an extruder, wherein the extruder comprises a feed zone, a first melt zone downstream of the feed zone, a second melt zone downstream of the first melt zone, and a third melt zone downstream of the second melt zone. The resin is melted in the first zone, contacted with oxygen in the second melt zone, and contacted antioxidant in the third melt zone.