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:
Dec. 03, 2002
Filed:
Feb. 15, 2000
Applicant:
Inventors:
Evan V. Rohlf, Tower Lakes, IL (US);
Charles W. Cochran, Ider, AL (US);
Assignee:
United States Gypsium Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 2/404 ; B32B 2/108 ;
U.S. Cl.
CPC ...
B32B 2/404 ; B32B 2/108 ;
Abstract
A gypsum wall board is disclosed in which at least one of the paper cover sheets is made with neutral size and a small amount of a cationic polyamide resin is added to the stock used to make the cover sheet. The paper cover sheets provide improved resistance to post-manufacturing problems that involve delamination, such as “Roll-up”.