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:
Jul. 06, 2021
Filed:
Feb. 22, 2019
Applicant:
Agc Inc., Chiyoda-ku, JP;
Inventors:
Assignee:
AGC Inc., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/087 (2006.01); C03C 3/091 (2006.01); C03C 3/093 (2006.01);
U.S. Cl.
CPC ...
C03C 3/093 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01);
Abstract
To provide an alkali-free glass, of which the compaction is low, the strain point is high, and the ultraviolet transmittance is high, and which is easy to melt. An alkali-free glass, which comprises, as represented by mol % based on oxides, wherein MgO+CaO+SrO+BaO is from 12 to 22, and 4.84[FeO]+5.65[NaO]+4.03[KO]+4.55[SnO] is at most 0.55, and of which the compaction is at most 80 ppm.