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:
Apr. 17, 2018
Filed:
Oct. 15, 2014
United States Gypsum Company, Chicago, IL (US);
Dennis Mark Lettkeman, Watonga, OK (US);
John Wesley Wilson, Fairview, OK (US);
Mike L. Cloud, Canton, OK (US);
Brian K. Ball, Fort Dodge, IA (US);
Raymond A. Kaligian, Geneva, IL (US);
Doug Blackburn, Port Clinton, OH (US);
UNITED STATES GYPSUM COMPANY, Chicago, IL (US);
Abstract
DTPA-coated synthetic calcined gypsum is provided with alpha-like properties and obtained by spray-coating the synthetic caclined gypsum with DTPA. Cementitious compositions comprising DTPA-coated synthetic calcined gypsum and low water demand are provided as well. Methods for controlling an open time of a cementitious slurry by increasing or decreasing the amount of DTPA-coated synthetic calcined gypsum in the slurry are provided as well.