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:
Apr. 16, 2019
Filed:
Mar. 05, 2012
Applicant:
Hubert C. Francis, Lithonia, GA (US);
Inventor:
Hubert C. Francis, Lithonia, GA (US);
Assignee:
Georgia-Pacific Gypsum LLC, Atlanta, GA (US);
Primary Examiner:
Int. Cl.
CPC ...
B32B 13/08 (2006.01); B28B 19/00 (2006.01); C04B 28/14 (2006.01); C04B 38/00 (2006.01); B32B 5/24 (2006.01); B32B 37/15 (2006.01); C04B 24/16 (2006.01); C04B 111/40 (2006.01); C04B 111/00 (2006.01); C04B 111/10 (2006.01); C04B 111/30 (2006.01);
U.S. Cl.
CPC ...
B32B 13/08 (2013.01); B28B 19/0092 (2013.01); B32B 5/245 (2013.01); B32B 37/15 (2013.01); C04B 24/16 (2013.01); C04B 28/14 (2013.01); C04B 38/0067 (2013.01); C04B 2111/00629 (2013.01); C04B 2111/10 (2013.01); C04B 2111/30 (2013.01); C04B 2111/40 (2013.01); C04B 2201/20 (2013.01); Y10T 428/249953 (2015.04); Y10T 428/31982 (2015.04);
Abstract
A lightweight gypsum wallboard having a foamed gypsum core reinforced with pre-gelatinized, e.g., pre-gelled, starch and prepared by mixing an aqueous foam into a gypsum slurry comprising a source of calcined gypsum (commonly known as plaster of Paris), pre-gelled starch and a lignosulfonate dispersant; allowing the so-formed gypsum slurry to set, and then drying the set gypsum core.