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:
Jan. 11, 2011
Filed:
Oct. 22, 2007
Applicant:
Atsushi Nagaoka, Sagamihara, JP;
Inventor:
Atsushi Nagaoka, Sagamihara, JP;
Assignee:
Ohara, Inc., Kanagawa, JP;
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/062 (2006.01); C03C 3/064 (2006.01); C03C 3/12 (2006.01); C03C 3/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
Optical glass containing bismuth oxide having good defoamability. The Optical glass contains, as % by mass, from 10 to less than 90% of a Bi2O3 component and at least 0.1% of a TeO2 and/or SeO2 component. The optical glass is on Grade 4 to Grade 1 in 'JOGIS12-1994, Method for Measuring Bubbles in Optical Glass'. By controlling the amount of RO component (R is at least one selected from a group consisting of Zn, Ba, Sr, Ca, Mg) and Rn2O component (Rn═Li, Na, K, Cs), the clarifying time may be shortened.