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. 11, 2023
Filed:
Dec. 18, 2014
Applicant:
National Gypsum Properties, Llc, Charlotte, NC (US);
Inventors:
Eli Stav, Charlotte, NC (US);
Ma-Ikay Miatudila, Monroe, NC (US);
Assignee:
Gold Bond Building Products, LLC, Charlotte, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 11/00 (2006.01); B32B 18/00 (2006.01); C04B 28/14 (2006.01); C04B 24/38 (2006.01); C04B 111/00 (2006.01);
U.S. Cl.
CPC ...
C04B 28/145 (2013.01); C04B 24/38 (2013.01); C04B 2111/0062 (2013.01); Y10T 428/31971 (2015.04);
Abstract
Gypsum board having improved performance is obtained by controlling the distribution of starch in the gypsum core of the board and the gelling temperature of the starch. Starch migration in the board is controlled by the degree of acid-modification, to adjust the starch viscosity profile. The starch gelling temperature is controlled by chemical modification of the starch —OH groups.