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:
Oct. 21, 2025
Filed:
Aug. 06, 2021
Applicant:
Agc Inc., Tokyo, JP;
Inventors:
Hirofumi Tokunaga, Tokyo, JP;
Kazutaka Ono, Tokyo, JP;
Assignee:
AGC Inc., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/091 (2006.01); C03C 3/087 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01); C03C 3/087 (2013.01);
Abstract
An alkali-free glass includes, in mol % in terms of oxides: SiO: 63-69%; AlO: 8-13%; BO: 0.5-4%; MgO: 8-15%; CaO: 4-12%; SrO: 0-4.5%; and BaO: 0-1%. [MgO]/[CaO] is 0.67 to 3.75. A value of Formula (A) is 84 or larger. A value of Formula (B) is 715 or smaller. A value of Formula (C) is 200 or smaller. A value of Formula (D) is 15 or smaller.
Quick Actions:
Tokunaga, Hirofumi. (2025). Alkali-free glass (U.S. Patent No. 12448319). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12448319
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile