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:
May. 21, 2013
Filed:
Aug. 11, 2011
Applicants:
James R. Wittbold, Des Plaines, IL (US);
W. David Song, Vernon Hills, IL (US);
Inventors:
James R. Wittbold, Des Plaines, IL (US);
W. David Song, Vernon Hills, IL (US);
Assignee:
United States Gypsum Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B 9/04 (2006.01); C04B 11/00 (2006.01); C04B 28/14 (2006.01); B29C 65/00 (2006.01); B32B 13/00 (2006.01); B32B 37/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided are methods and systems for introducing a wet gypsum accelerator or other high viscosity production additive to an aqueous dispersion of calcined gypsum in a discharge apparatus downstream of a stucco mixer in which the dispersion was prepared. These methods and systems are useful in the production of various gypsum products such as board including wallboard and ceiling tiles.