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:
Sep. 30, 2025
Filed:
Feb. 23, 2023
Applicant:
Agc Inc., Tokyo, JP;
Inventors:
Yusaku Matsuo, Tokyo, JP;
Hiroyuki Hijiya, Tokyo, JP;
Yuya Hamada, Tokyo, JP;
Yutaka Kuroiwa, Tokyo, JP;
Assignee:
AGC Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/091 (2006.01); C03C 4/16 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01); C03C 4/16 (2013.01);
Abstract
An alkali-free glass includes, as represented by mol % based on oxides: 50 to 80% of SiO; 2 to 6% of AlO; 18 to 35% of BO; 1 to 6% of MgO; 0 to 6% of CaO; 0 to 6% of SrO; and 0 to 3% of BaO. A formula (A) is [MgO]+[CaO]+[SrO]+[BaO], and a value of the formula (A) is 2% or more and 6% or less. A formula (B) is [AlO]—([MgO]+[CaO]+[SrO]+[BaO]), and a value of the formula (B) is −3% or more and 2% or less.