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:
Dec. 07, 2021
Filed:
Jan. 13, 2020
Applicant:
Agc Inc., Chiyoda-ku, JP;
Inventor:
Madoka Ono, Tokyo, JP;
Assignee:
AGC Inc., Chiyoda-ku, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/091 (2006.01); C03C 23/00 (2006.01); C03C 21/00 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01); C03C 23/007 (2013.01); C03C 21/001 (2013.01);
Abstract
A strengthened glass has a mirror constant A of 1.97 MPa·mor less, a surface compressive stress (CS) of 10 MPa or more. A product (t×CS) of a sheet thickness t (unit: mm) and the CS (unit: MPa) is less than 230. The strengthened glass may have a fictive temperature at a central portion in a sheet thickness t direction of not lower than a glass transition temperature Tg and Tg+100° C. or lower.