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:
Feb. 27, 2018
Filed:
Apr. 18, 2017
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); G02F 1/1333 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01); G02F 1/1333 (2013.01); G02F 2001/133302 (2013.01); G02F 2202/09 (2013.01);
Abstract
Provided is a non-alkali glass having a strain point of 680° C. or higher, having an average thermal expansion coefficient of from 30×10/° C. to 45×10/° C. at from 50° C. to 350° C., containing, indicated by mass % on the basis of oxides: SiO: 54% to 66%, AlO: 10% to 27%, BO: 0.2% to 5.5%, MgO: 0% to 10%, CaO: 0% to 15%, SrO: 0% to 15%, BaO: 0% to 15%, and MgO+CaO+SrO+BaO: 8% to 25%, containing 600 mass ppm or less of NaO, and satisfying a mass ratio (NaO/BO) between NaO and BObeing from 0.001 to 0.3.