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:
Jun. 05, 2012
Filed:
Sep. 03, 2009
Applicants:
Teruhide Inoue, Tokyo, JP;
Kunihiro Nomiyama, Tokyo, JP;
Koichi Sakaguchi, Tokyo, JP;
Inventors:
Assignee:
Nippon Sheet Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 13/04 (2006.01); C03C 3/076 (2006.01); C03C 3/095 (2006.01); C03C 3/085 (2006.01); D02G 3/00 (2006.01); B32B 9/00 (2006.01); B32B 17/06 (2006.01); G02B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A clad glass composition that is excellent in devitrification resistance and that prevents the whole mother glass rod from devitrifying by preventing a core glass composition from devitrifying in forming a mother glass rod using a concentric crucible drawing method, is provided. The clad glass composition forms a clad of a mother glass rod for a gradient-index rod lens having a core/clad structure.