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. 17, 2023
Filed:
Sep. 18, 2020
Applicant:
United States Gypsum Company, Chicago, IL (US);
Inventors:
Yijun Sang, Oak Park, IL (US);
Mark Hemphill, Hawthorn Woods, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B 24/38 (2006.01); C04B 28/14 (2006.01); B32B 13/04 (2006.01); B32B 13/08 (2006.01); E04C 2/04 (2006.01); B32B 37/00 (2006.01); C09J 103/02 (2006.01); B32B 37/15 (2006.01); B32B 38/00 (2006.01); C04B 111/00 (2006.01); B32B 38/16 (2006.01);
U.S. Cl.
CPC ...
C04B 24/383 (2013.01); B32B 13/04 (2013.01); B32B 13/08 (2013.01); B32B 37/0038 (2013.01); B32B 37/15 (2013.01); B32B 38/0036 (2013.01); B32B 38/164 (2013.01); C04B 28/14 (2013.01); C09J 103/02 (2013.01); E04C 2/043 (2013.01); E04C 2/049 (2013.01); B32B 38/0004 (2013.01); B32B 2038/166 (2013.01); B32B 2309/02 (2013.01); B32B 2315/18 (2013.01); B32B 2317/20 (2013.01); C04B 2111/0062 (2013.01); C04B 2201/50 (2013.01);
Abstract
Disclosed is an acid-modified flour and a method of making the acid-modified flour. The acid-modified flour is desirably prepared using a dry milling process. A starting flour is combined with a strong acid to form a mixture. The mixture is heated. A neutralizer is added to increase the pH of the mixture. If desired, the mixture can be dried and any agglomerates can be removed. The acid-modified flour can be used as a binder in a slurry for preparing one or more gypsum layers in a gypsum board.