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. 11, 2025
Filed:
Jun. 26, 2020
Applicant:
Nippon Electric Glass Co., Ltd., Shiga, JP;
Inventors:
Satoko Konoshita, Shiga, JP;
Takahiro Matano, Shiga, JP;
Assignee:
NIPPON ELECTRIC GLASS CO., LTD., Shiga, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/068 (2006.01); C03C 4/08 (2006.01); G02B 5/20 (2006.01);
U.S. Cl.
CPC ...
C03C 3/068 (2013.01); C03C 4/08 (2013.01); G02B 5/204 (2013.01);
Abstract
The present invention provides an optical glass that has a high refractive index property and excels in a light transmittance property in the visible range and in resistance to devitrification. The optical glass contains from 3 to 18 mass % of SiO, from 5 to 11.5 mass % of BO, from 0 to 7 mass % of AlO, from 0 to 11 mass % of CaO, 1 mass % or less of ZnO, from 7 to 20 mass % of TiO, from 3 to 38 mass % of NbO, from 27 to 49.8 mass % of LaO, from 6 to 14 mass % of GdO, from 0 to 5 mass % of YO, less than 6 mass % of TaO, and 0.6 mass % or less of WO, with a ratio of BO/SiObeing from 1 to 2.