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:
May. 02, 2000
Filed:
Jul. 28, 1998
Applicant:
Inventors:
James Morano, Miami, FL (US);
Gerald P Balcar, Dunkirk, NY (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ;
U.S. Cl.
CPC ...
501 53 ; 501 55 ; 501155 ; 65 19 ; 651348 ; 106D / ;
Abstract
An environmentally safe abrasive composition which contains at least about 60 weight percent of ferrometalsilicate, at least about 5 weight percent of spinel, and at least about 70 weight percent of crystalline material. This composition has a Vickers hardness of at least about 550 and a density of from about 2.8 to about 4.1 grams per cubic centimeter. It is crystallized in situ from a thermally crystallizable mixture comprising from about 50 to about 75 weight percent of electric arc furnace dust, from about 5 to about 40 weight percent of glass, and at least about 10 weight percent of silica sand.