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. 28, 2005
Filed:
Dec. 24, 2003
Michio Endo, Tokyo, JP;
Michio Endo, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
An optical glass whose refractive index is high and whose coloring is decreased comprising, by weight %, 2 to 45% of BO, 0 to 30% of SiOprovided that the content of BO>the content of SiO, 10 to 50% of LaO, 0 to 30% of TiO, 0 to 15% of ZnO, 0 to 15% of ZrO, 0 to 35% of NbO, 0 to 35% of BaO, 0 to 5% of SrO, 0% or more but less than 8% of CaO, 0% or more but less than 13% of MgO, provided that the total content of BaO, SrO, CaO and MgO is 0 to 40%, 0 to 20% of GdO, 0 to 15% of YO, 0 to 18% of TaO, 0% or more but less than 0.5% of WO, 0% or more but less than 1.5% of a total of NaO, KO and LiO, 0 to 10% of GeO, 0 to 20% of BiO, 0 to 10% of YbO, 0 to 10% of AlO, 0% or more but less than 2% of SbOand 0 to 1% of SnO.