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. 29, 2014
Filed:
Mar. 30, 2012
Applicants:
Tomoyuki Tsujimura, Tokyo, JP;
Yuichi Kuroki, Tokyo, JP;
Manabu Nishizawa, Tokyo, JP;
Inventors:
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/085 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to a glass plate for a substrate contains, as a glass matrix composition, in mol % on the oxide basis, SiO: 67 to 72, AlO: 1 to 7, BO: 0 to 4, MgO: 11 to 15, CaO: 0 to 3, SrO: 0 to 3, BaO: 0 to 4, ZrO: 0 to 4, NaO: 8 to 15, and KO: 0 to 7, with SiO+AlO: 71 to 77, MgO+CaO+SrO+BaO: 11 to 17, NaO+KO: 8 to 17, and satisfying KO/(NaO+KO)≦0.13×(SiO+AlO+0.5BO+0.3BaO)−9.4, in which the glass plate has a β-OH value (mm) of 0.05 to 0.5, and a heat shrinkage ratio (C) of 16 ppm or less.