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. 22, 2005
Filed:
Aug. 20, 2003
Applicants:
Alexei Kazakov, Calgary, CA;
Stephen John Brown, Calgary, CA;
Christopher John Brooke Dobbin, Calgary, CA;
Stanley Allan Grabow, Calgary, CA;
Inventors:
Alexei Kazakov, Calgary, CA;
Stephen John Brown, Calgary, CA;
Christopher John Brooke Dobbin, Calgary, CA;
Stanley Allan Grabow, Calgary, CA;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L023/00 ; C08L023/04 ; F16L011/00 ;
U.S. Cl.
CPC ...
Abstract
A solution polymerization process in a series or parallel of two or more reactors at different temperatures is used to prepare a multimodal polyolefin resin of narrow molecular weight distribution. This resin is used to manufacture melt extruded pipe that has an improved performance at elevated temperatures and an improved hydrostatic design.