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:
Oct. 11, 2011
Filed:
Apr. 13, 2007
Applicants:
Yufeng Xu, Gurnee, IL (US);
Renee J. Weinberger, Waukegan, IL (US);
Inventors:
Yufeng Xu, Gurnee, IL (US);
Renee J. Weinberger, Waukegan, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 65/00 (2006.01); B32B 13/00 (2006.01); B32B 37/00 (2006.01); B32B 9/00 (2006.01); B32B 19/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Repulped fiber that has been treated with an aqueous solution of a caustic selected from sodium hydroxide, potassium hydroxide and sodium carbonate, is used to make wallboard paper that is used to make a gypsum wallboard having improved nail pulling strength compared to gypsum wallboard made with fiber wallboard paper that has not been treated with caustic.