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. 30, 1996
Filed:
Nov. 14, 1994
Applicant:
Inventor:
Robert W Pfitzenmaier, Canisteo, NY (US);
Assignee:
Corning Incorporated, Corning, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
501-7 ; 501-4 ; 501 64 ; 501 68 ; 501 69 ;
Abstract
An ivory-colored, opaque glass-ceramic having a beta-spodumene solid solution as its primary crystal phase, and a method of controlling color in the glass-ceramic. The glass-ceramic is produced from a Li.sub.2 O--Al.sub.2 O.sub.3 --SiO.sub.2 precursor glass containing 3-6% TiO.sub.2 +ZrO.sub.2 as a nucleating agent and having colorants controlled at levels of up to 20 ppm Co.sub.3 O.sub.4, up to 1000 ppm Fe.sub.2 O.sub.3 and 1000-2000 ppm CeO.sub.2.