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:
Nov. 06, 2012
Filed:
Feb. 01, 2012
Qiang Yu, Grayslake, IL (US);
Steven W. Sucech, Lake Villa, IL (US);
Brent E. Groza, Grayslake, IL (US);
Raymond J. Mlinac, Wildwood, IL (US);
Frederick T. Jones, Grayslake, IL (US);
Paul J. Henkels, Arlington Heights, IL (US);
Qiang Yu, Grayslake, IL (US);
Steven W. Sucech, Lake Villa, IL (US);
Brent E. Groza, Grayslake, IL (US);
Raymond J. Mlinac, Wildwood, IL (US);
Frederick T. Jones, Grayslake, IL (US);
Paul J. Henkels, Arlington Heights, IL (US);
United States Gypsum Company, Chicago, IL (US);
Abstract
The invention provides a set gypsum-containing product having increased resistance to permanent deformation and a method for preparing it comprising forming a mixture of a calcium sulfate material, water, and an appropriate amount of one or more enhancing materials chosen from condensed phosphoric acids, each of which comprises 2 or more phosphoric acid units; and salts or ions of condensed phosphates, each of which comprises 2 or more phosphate units. The mixture is then maintained under conditions sufficient for the calcium sulfate material to form a set gypsum material.