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:
Aug. 07, 2012
Filed:
Sep. 23, 2011
Applicants:
Manabu Nishizawa, Tokyo, JP;
Yuya Shimada, Tokyo, JP;
Junichiro Kase, Tokyo, JP;
Inventors:
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/085 (2006.01); C03C 3/091 (2006.01);
U.S. Cl.
CPC ...
Abstract
Provided is a glass plate for a substrate, which comprises, as a glass matrix composition as represented by mass % based on oxide: SiO: 70 to 80, AlO: 0.1 to 5, BO: 0 to 3, MgO: 9.5 to 12, where the amount of CaO+SrO+BaO is 0 to 2, and the amount of NaO+KO is 12.5 to 15.5, which has a density of at most 2.5 g/cm, has an average coefficient of thermal expansion from 50 to 350° C. of more than 75×10/° C. and at most 87×10/° C., has a glass transition point of at least 560° C., has a brittleness of at most 6.5 μm, and has a heat shrinkage (C)of at most 20 ppm.