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:
May. 19, 2020
Filed:
Jul. 27, 2018
Applicant:
Agc Inc., Chiyoda-ku, JP;
Inventors:
Isao Saito, Chiyoda-ku, JP;
Yasumasa Kato, Chiyoda-ku, JP;
Assignee:
AGC Inc., Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03B 27/012 (2006.01); C03B 27/04 (2006.01); C03B 29/02 (2006.01); C03B 29/08 (2006.01); C03C 21/00 (2006.01);
U.S. Cl.
CPC ...
C03B 27/012 (2013.01); C03B 27/0413 (2013.01); C03B 29/025 (2013.01); C03B 29/08 (2013.01); C03C 21/002 (2013.01);
Abstract
To provide a method for tempering glass to obtain tempered glass having high surface quality and a deep compression stress layer. The present invention relates to a method for tempering a glass plate comprising a preparation step of preparing a glass plate having a surface temperature of at most the strain point, an internal heating step of heating the internal temperature of the glass plate to be at least the annealing point, while maintaining the surface temperature of the glass plate within 10 minutes, or to be at most the strain point, and a cooling step of cooling the glass plate.