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:
Feb. 02, 2016
Filed:
Oct. 09, 2008
Applicant:
Sebastian Joseph, Mason, OH (US);
Inventor:
Sebastian Joseph, Mason, OH (US);
Assignee:
Equistar Chemicals, LP, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/08 (2006.01); C08L 23/06 (2006.01); C08L 23/08 (2006.01); B32B 1/02 (2006.01);
U.S. Cl.
CPC ...
C08L 23/06 (2013.01); C08L 23/0815 (2013.01); C08L 2308/00 (2013.01); Y10T 428/139 (2015.01);
Abstract
Multimodal polyethylene resins having improved stress crack resistance and melt strength rendering them useful for the manufacture of thick-walled pipe are produced in a process wherein the second stage of the process is a copolymerization conducted at a high temperature with a low comonomer to ethylene ratio and a low hydrogen to ethylene ratio.