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:
Jul. 18, 2017
Filed:
Oct. 22, 2015
Applicant:
Asahi Glass Company, Limited, Tokyo, JP;
Inventors:
Assignee:
ASAHI GLASS COMPANY, LIMITED, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/085 (2006.01); C03C 4/00 (2006.01); C03C 3/11 (2006.01); C03C 3/087 (2006.01); C03C 3/091 (2006.01); C03C 3/118 (2006.01);
U.S. Cl.
CPC ...
C03C 4/0085 (2013.01); C03C 3/085 (2013.01); C03C 3/087 (2013.01); C03C 3/091 (2013.01); C03C 3/11 (2013.01); C03C 3/118 (2013.01);
Abstract
The present invention relates to an alkali-free glass substrate, having a strain point of 680° C. or higher, a Young's modulus of 78 GPa or greater, an UV transmittance at a wavelength of 300 nm of from 40% to 85% in terms of 0.5 mm thickness, an in-plane distribution of the UV transmittance at a wavelength of 300 nm in a G6-sized substrate of 1% or less in terms of 0.5 mm thickness, an average cooling rate around the glass transition point obtained according to a rate cooling method of 400° C./min or lower, and an in-plane distribution of the average cooling rate of 40° C./min or less.