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. 21, 2003
Filed:
Aug. 20, 1997
Applicant:
Inventors:
Jun Naka, Kyoto, JP;
Toshiharu Narita, Otsu, JP;
Shinkichi Miwa, Nishinomiya, JP;
Shigeru Yamamoto, Kyoto, JP;
Assignee:
Nippon Electric Glass Co., Ltd., Shiga, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B 5/16 ;
U.S. Cl.
CPC ...
C03B 5/16 ;
Abstract
An alkali-free glass applicable to a light transparent glass substrate in a liquid crystal display essentially consists, by weight, of basic elements of 40-70% SiO , 6-25% Al O , 5-20% B O , 0-10% MgO, 0-15% CaO, 0-30% BaO, 0-10% SrO, and 0-10% ZnO, and a fining agent of a combination of 0.05-3% Sb O and at least one of 0.05-2% SnO and 0.005-1% Cl , which fining agent makes the resultant glass free from bubbles without the use of toxic As O which has been known as the fining agent in the art.