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. 09, 1999
Filed:
Aug. 21, 1998
Applicant:
Inventors:
Jashbhai M Patel, Amherst, NY (US);
Ronald S Finkelstein, East Amherst, NY (US);
Assignee:
National Gypsum Company, Charlotte, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106781 ; 106772 ; 106778 ; 106779 ; 106780 ; 106783 ; 106785 ; 106787 ; 106802 ; 106805 ; 106809 ; 106823 ; 156 39 ; 52443 ; 428703 ;
Abstract
A method of preparation of gypsum wallboard, as well as a core composition suitable for use therein, are disclosed. The core composition includes a slurry of calcium sulfate hemihydrate (stucco), water, and calcium aluminum lignosulfonate and/or aluminum lignosulfonate.