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:
Mar. 19, 2013
Filed:
May. 02, 2011
Applicants:
Haruki Niida, Tokyo, JP;
Akihiro Koyama, Tokyo, JP;
Yukihito Nagashima, Tokyo, JP;
Satoshi Furusawa, Tokyo, JP;
Inventors:
Haruki Niida, Tokyo, JP;
Akihiro Koyama, Tokyo, JP;
Yukihito Nagashima, Tokyo, JP;
Satoshi Furusawa, Tokyo, JP;
Assignee:
AvanStrate Inc., Mie, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/091 (2006.01); C03C 3/11 (2006.01);
U.S. Cl.
CPC ...
Abstract
A glass composition which is reduced in the amount of residual bubbles and is produced using smaller amounts of an environmentally unfriendly component such as arsenic oxide and antimony oxide. This glass composition comprises, in terms of mass %; 40-70% SiO; 5-20% BO; 10-25% AlO; 0-10% MgO; 0-20% CaO; 0-20% SrO; 0-10% BaO; 0.001-0.5% LiO; 0.01-0.5% NaO; 0.002-0.5% KO; and 0-1.0%, excluding 0%, Cl.