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. 14, 2012
Filed:
Dec. 15, 2008
Applicants:
Toshitaka Yagi, Sagamihara, JP;
Naoyuki Goto, Sagamihara, JP;
Inventors:
Toshitaka Yagi, Sagamihara, JP;
Naoyuki Goto, Sagamihara, JP;
Assignee:
Ohara Inc., Sagamihara-shi, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 10/04 (2006.01); C03C 10/14 (2006.01); G11B 7/241 (2006.01);
U.S. Cl.
CPC ...
Abstract
For providing glass-ceramics having properties suitable for use as a substrate of an information storage medium of next generation such as one for the perpendicular magnetic recording system without employing arsenic and antimony components which adversely affect human beings and the environment, there are provided glass-ceramics comprising SiO, LiO and AlOon oxide basis, comprising lithium disilicate as a crystal phase, and comprising one or more elements selected from the group consisting of Sn, Ce, Mn, W, Ta, Bi, Nb, S, Cl and F.