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:
Jul. 03, 2007
Filed:
Mar. 13, 2003
Applicants:
Roman B. Hawrylko, Avon Lake, OH (US);
Peter W. Krause, Grand Valley, CA;
Michel Levesque, Beauharnois, CA;
Inventors:
Roman B. Hawrylko, Avon Lake, OH (US);
Peter W. Krause, Grand Valley, CA;
Michel Levesque, Beauharnois, CA;
Assignee:
PolyOne Corporation, Avon Lake, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08L 1/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Poly(vinyl chloride) is compounded with a chalk-like, essentially pure calcium carbonate to provide improved weathering resistance of rigid poly(vinyl chloride) articles subjected to external exposures of heat and sunlight. Blends and alloys are also disclosed. Optionally, one can add either zinc alkyl ester scavenger, organotin stabilizer, or both to further improve the effectiveness of the essentially pure calcium carbonate.