ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,466,760, issued on Nov. 11, was assigned to NIPPON ELECTRIC GLASS Co. LTD. (Shiga, Japan).
"Optical glass" was invented by Satoko Konoshita (Shiga, Japan) and Takahiro Matano (Shiga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "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 SiO2, from 5 to 11.5 mass % of B2O3, from 0 to 7 mass % of Al2O3, from 0 to 11 mass % of CaO, 1 mass % or less of ZnO, from 7 to 20 mass % of TiO2, from 3 to 38 mass % of Nb2O5, fro...