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:
Aug. 16, 2022
Filed:
Mar. 05, 2019
United States Gypsum Company, Chicago, IL (US);
David D. Pelot, Chicago, IL (US);
Samar Emami, Chicago, IL (US);
Robert H. Negri, Lake Villa, IL (US);
Juan Carlos Ruiz Castaneda, Nuevo Leon, MX;
Christopher R. Nelson, Lindenhurst, IL (US);
John J. Roxburgh, Chicago, IL (US);
Edgar R. De La Rosa Cruz, San Pedro Cholula, MX;
Jorge A. Garcia Torres, San Pedro Cholula, MX;
Miguel Gama Goicochea, Campestre Churubusco, MX;
Antonio Contreras, Aurora, IL (US);
Juan Huitzil, San Miguelito, MX;
UNITED STATES GYPSUM COMPANY, Chicago, IL (US);
Abstract
Method of making foamed gypsum slurry having 15 to 90 volume percent gas bubbles including: passing first slurry including water and on dry basis 50 to 98 wt. % calcium sulfate hemihydrate, 1 to 50 wt. % calcium carbonate, and 0.1 to 10 wt. % cellulose thickener via a first hose to a Wye connector conduit first inlet opening at Rate C and passing alum solution via a second hose to a second inlet opening of the conduit at Rate D to create combined mixed stream passing from the conduit to a static mixer for mixing for Time 3 to activate at least a portion of the calcium carbonate and alum to generate COand create the foamed gypsum slurry; transferring the slurry from the mixer to a cavity between two wall boards via a third hose. Allowing the slurry in the cavity to expand, harden and dry.