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. 24, 2001
Filed:
Aug. 16, 1999
Applicant:
Inventors:
Frank H. Campbell, Matthews, NC (US);
Robert J. Piasecki, Charlotte, NC (US);
Larry W. Kingston, North Tonawanda, NY (US);
Edward A. Burkard, East Amherst, NY (US);
Assignee:
National Gypsum Company, Charlotte, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B 1/100 ; C04B 2/214 ; C04B 2/410 ;
U.S. Cl.
CPC ...
C04B 1/100 ; C04B 2/214 ; C04B 2/410 ;
Abstract
A composition for accelerating the setting reaction of an aqueous calcined gypsum slurry, and a method of making the same are disclosed. The composition includes a vibratory ball milled mixture of calcium sulfate dihydrate and a surfactant. The composition is prepared by subjecting the mixture to the high-frequency, low-impact grinding action of a vibratory ball mill. The resultant composition has a potency superior to that of conventional gypsum set accelerators.