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:
Jun. 02, 2026
Filed:
Mar. 04, 2024
Agc Inc., Tokyo, JP;
Yuya Hamada, Chiyoda-ku, JP;
Hirofumi Tokunaga, Chiyoda-ku, JP;
AGC Inc., Tokyo, JP;
Abstract
The present invention relates to an alkali-free glass having a strain point of 700° C. or higher and 740° C. or lower, a density of 2.6 g/cmor lower, a Young's modulus of 90 GPa or higher and 100 GPa or lower, an average coefficient of thermal expansion at 50° C. to 350° C. of 30×10/K or higher and 39×10/K or lower, a temperature Tat which a glass viscosity reaches 10dPa·s of 1590° C. or higher and 1690° C. or lower, a temperature Tat which the glass viscosity reaches 10dPa·s of 1350° C. or lower, a glass surface devitrification temperature (T) of lower than (T+80)° C., and a specific elastic modulus of 36 MN·m/kg or higher, and including a prescribed glass composition.