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. 19, 2013
Filed:
May. 28, 2010
Applicants:
Satoru Tomeno, Tokyo, JP;
Yuki Kondo, Tokyo, JP;
Inventors:
Satoru Tomeno, Tokyo, JP;
Yuki Kondo, Tokyo, JP;
Assignee:
Asahi Glass Company, Limited, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C03C 3/066 (2006.01);
U.S. Cl.
CPC ...
Abstract
The present invention relates to an optical glass containing, in terms of mass % on the basis of oxides, BO: 10 to 20%, SiO: 0.5 to 12%, ZnO: 5 to 19%, TaO: 2.5 to 17%, LiO: 0.2 to 3%, ZrO: 0.6 to 4.9%, WO: 1 to 20%, LaO: 25 to 50%, GdO: 0 to 13%, and YO: 0.2 to 20%, provided that LaO+GdO+YOis 35 to 60%, in which the optical glass does not substantially contain NbO, and has a refractive index (n) of 1.82 to 1.86, an Abbe's number (ν) of 37 to 44 and a glass transition point (T) of 630° C. or lower.