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. 30, 2017
Filed:
Dec. 08, 2014
Applicant:
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Inventors:
Assignee:
ASAHI GLASS COMPANY, LIMITED, Chiyoda-ku, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/093 (2006.01); C03C 3/091 (2006.01); C03C 15/00 (2006.01);
U.S. Cl.
CPC ...
C03C 3/093 (2013.01); C03C 3/091 (2013.01); C03C 15/00 (2013.01);
Abstract
The present invention relates to an alkali-free glass having a strain point of from 680 to 735° C., an average thermal expansion coefficient at from 50 to 350° C. of from 30×10to 43×10/° C., and a specific gravity of 2.60 or less, and containing, indicated by mol % on the basis of oxides, SiO65 to 69%, AlO11.5 to 14%, BO3 to 6.5%, MgO 1 to 5%, CaO 7.5 to 12%, SrO 0 to 1%, BaO 0.5 to 6%, and ZrO0 to 2%.