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:
Nov. 29, 2016
Filed:
Dec. 02, 2013
Applicant:
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Inventors:
Assignee:
ASAHI GLASS COMPANY, LIMITED, Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/091 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01);
Abstract
The present invention relates to a non-alkali glass substrate, having a strain point of 685° C. or higher and 750° C. or lower, an average thermal expansion coefficient at 50 to 350° C. of from 35×10to 43×10/° C., a specific gravity of from 2.50 to 2.80, a photoelastic constant of 25 nm/MPa/cm or more and less than 29 nm/MPa/cm, and a temperature (T) at which viscosity reaches 10dPa·s of 1,250° C. or higher and lower than 1,350° C., and having a prescribed composition.