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:
Apr. 08, 1980
Filed:
Sep. 14, 1978
Applicant:
Inventors:
Merritt J Hummel, Lower Burrell, PA (US);
Vincent Lupoi, Butler, PA (US);
Richard L Cerutti, Seminole, PA (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03B / ; C03C / ;
U.S. Cl.
CPC ...
65 33 ; 65 6 / ; 65 6 / ; 427229 ; 427287 ;
Abstract
Glass-ceramic articles having compositional inhomogeneities are provided with uniformly colored gray stain decorations by heat treating a palladium-containing staining material prior to application onto glass-ceramic articles which have been crystallized by a separate heat treatment, and then subjecting the glass-ceramic articles in contact with the staining material to another heat treatment to produce the stain decorations.