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. 23, 2004
Filed:
Aug. 27, 2001
Applicant:
Inventors:
Hiroshi Komori, Otsu, JP;
Hiroki Yamazaki, Koga-gun, JP;
Assignee:
Nippon Electric Glass Co., Ltd., Shiga, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 3/100 ; C03C 3/076 ; C03C 3/083 ; C03C 3/085 ; C03C 3/078 ;
U.S. Cl.
CPC ...
H01J 3/100 ; C03C 3/076 ; C03C 3/083 ; C03C 3/085 ; C03C 3/078 ;
Abstract
In order to suppress production of devitrifying stones such as barium disilicate and strontium silicate and to achieve a high X-ray absorbability, a CRT panel glass does not substantially contain PbO and contains, in mass percent, 9-9.5% SrO and 8.5-9% BaO. In addition, the value of SrO/(SrO+BaO) is set to 0.50-0.53. Therefore, the CRT panel glass has an X-ray absorption coefficient of 28.0 cm or more at 0.6 Å.