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. 27, 2009
Filed:
Jun. 09, 2006
Dennis M. Lettkeman, Watonga, OK (US);
Michael P. Shake, Johnsburg, IL (US);
Qingxia Liu, Vernon Hills, IL (US);
John W. Wilson, Fairview, OK (US);
Brian Randall, Fairview, OK (US);
David R. Blackburn, Barrington, IL (US);
Dennis M. Lettkeman, Watonga, OK (US);
Michael P. Shake, Johnsburg, IL (US);
Qingxia Liu, Vernon Hills, IL (US);
John W. Wilson, Fairview, OK (US);
Brian Randall, Fairview, OK (US);
David R. Blackburn, Barrington, IL (US);
United States Gypsum Company, Chicago, IL (US);
Abstract
An improved gypsum slurry that includes water, calcium sulfate hemihydrate, a polycarboxylate dispersant and a modifier. The modifier is chemically configured to improve the efficacy of the polycarboxylate dispersant. Preferred modifiers include cement, lime, slaked lime, soda ash, carbonates, silicates and phosphates.