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:
Mar. 04, 2008
Filed:
Mar. 27, 2003
Dennis Mark Lettkeman, Watonga, OK (US);
Raymond A. Kaligian, Ii, Geneva, IL (US);
William K. Bedwell, Okeene, OK (US);
Eldon L. Whiteside, Hinsdale, IL (US);
Dennis Mark Lettkeman, Watonga, OK (US);
Raymond A. Kaligian, II, Geneva, IL (US);
William K. Bedwell, Okeene, OK (US);
Eldon L. Whiteside, Hinsdale, IL (US);
United States Gypsum Company, Chicago, IL (US);
Abstract
A mixture is used in conjunction with water is used for preparing a slurry that hydrates to form an exterior gypsum cement. The mixture includes 30-70% by weight hydraulic cement, 30-70% by weight calcined gypsum and 0.05-2.5% polycarboxylate. When the mixture is added to water less than 40 weight % based on the weight of the mixture, a slurry is formed that expands very little while it cures.