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:
Jan. 03, 1984
Filed:
Oct. 02, 1981
Applicant:
Inventors:
Charles J Hyatt, Cheswick, PA (US);
James L Oravitz, Jr, Cheswick, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
225-2 ; 83880 ; 225 96 ;
Abstract
Damage free scores are initiated in a refractory piece by advancing a pattern of grit material on the surface of the refractory piece under a properly biased scoring wheel. The grit material is preferably harder than the surface of the refractory piece but not as hard as the scoring surface of the scoring wheel.