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:
Nov. 12, 2013
Filed:
Oct. 12, 2011
Applicants:
Jun Endo, Chiyoda-ku, JP;
Tetsuya Nakashima, Chiyoda-ku, JP;
Atsuyoshi Takenaka, Chiyoda-ku, JP;
Inventors:
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 5/73 (2006.01); C03C 3/083 (2006.01);
U.S. Cl.
CPC ...
Abstract
To provide glass to be used for a substrate which is, as a substrate, less susceptible to surface roughening even if subjected to cleaning by means of a strongly acidic solution. Glass for a substrate, which comprises, as represented by mol % based on the following oxides, from 62.5 to 69% of SiO, from 9 to 15.5% of AlO, from 8 to 16 of LiO, from 0 to 8% of NaO, from 0 to 7% of KO and from 0 to 3.5% of ZrO, provided that SiO—AlOis at least 53.3%, LiO+NaO+KO is from 17 to 24%, and the total of contents of the above six components is at least 97%.