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:
Jul. 08, 2025
Filed:
Apr. 18, 2017
Sumita Optical Glass, Inc., Saitama, JP;
Koichi Tsuchiya, Saitama, JP;
Hideaki Takaku, Saitama, JP;
Sumita Optical Glass, Inc., Saitama, JP;
Abstract
An optical glass is provided which does not contain components negatively affecting the environment as environmental loads, and is less colored while having a refractive index maintained moderately high. The optical glass has a composition including, in % by mass, 30% or more and 47% or less of SiO, 0% or more and 10% or less of BO, 3% or more and 12% or less of NaO, 0% or more and 5% or less of LiO, 0% or more and 3.8% or less of CaO, 28% or more and 43% or less of BaO, 3% or more and 16% or less of ZnO, 0% or more and 8% or less of ZrO, 0% or more and 15% or less of LaO, where SbOis excluded from the composition, wherein the optical glass does not contain any of PbO, AsO, and KO.