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:
Feb. 17, 1998
Filed:
Oct. 18, 1996
Applicant:
Inventors:
Elisha Stav, Amherst, NY (US);
Edward A Burkard, East Amherst, NY (US);
Ronald S Finkelstein, East Amherst, NY (US);
Assignee:
National Gypsum Company, Charlotte, NC (US);
Primary Examiner:
Int. Cl.
CPC ...
C04B / ; C04B / ; C09D / ; C09D / ;
U.S. Cl.
CPC ...
106735 ; 106 1811 ; 106 1812 ; 106672 ; 106675 ; 106679 ; 106680 ; 106705 ; 106711 ; 106715 ; 106716 ; 106724 ; 106726 ; 106732 ; 106737 ; 106778 ; 106780 ; 106788 ; 106819 ; 106823 ;
Abstract
A cementitious composition useful for water-resistant construction materials, including floor underlayments, backing boards, self-leveling floor materials, road patching materials, fiberboard, fire-proofing sprays, and fire-stopping materials includes about 20 wt. % to about 75 wt. % calcium sulfate beta-hemihydrate, about 10 wt. % to about 50 wt. % Portland cement, about 4 wt. % to about 20 wt. % silica fume and about 1 wt. % to about 50 wt. % pozzolanic aggregate. The Portland cement component may also be a blend of Portland cement with fly ash and/or ground blast slag.