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:
Mar. 26, 2013
Filed:
Apr. 14, 2010
Applicants:
William G. Lutz, Linwood, MI (US);
John Kaarto, Missouri City, TX (US);
Robert J. Donald, Midland, MI (US);
Inventors:
William G. Lutz, Linwood, MI (US);
John Kaarto, Missouri City, TX (US);
Robert J. Donald, Midland, MI (US);
Assignee:
Braskem America, Inc., Philadelphia, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/08 (2006.01); C08K 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A mineral-filled, polypropylene composition comprises (i) a coupled, impact propylene polymer, and (ii) at least 0.5 weight percent (wt %) based on the weight of the composition of at least one of calcium carbonate and talc. The compositions are useful in the manufacture of three-layer pipe comprising (A) a first or outer non-foam layer; (B) a second or middle foam layer; and (C) a third or inner non-foam layer.