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:
Nov. 02, 1999
Filed:
Sep. 08, 1997
Applicant:
Inventor:
Thomas F Vezza, State College, PA (US);
Assignee:
North American Refractories Co., Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C04B / ;
U.S. Cl.
CPC ...
106694 ; 106695 ; 106705 ; 106706 ; 106811 ; 106812 ; 106D / ; 501144 ;
Abstract
An additive for reducing the calcium aluminate cement content in a refractory mix containing calcium aluminate cement. The additive is comprised of about 80% by weight amorphous, powdered metakaolin, the metakaolin having a mean particle size of less than about 3.0 microns, and about 20% by weight microsilica, the microsilica having a mean particle size of less than 45 microns.