US Patent Issued to TOSOH SGM on Sept. 8 for "Black quartz glass and method for producing same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,150, issued on Sept. 8, was assigned to TOSOH SGM Corp. (Yamaguchi, Japan).

"Black quartz glass and method for producing same" was invented by Minoru Kuniyoshi (Yamaguchi, Japan) and Manabu Sakurai (Yamaguchi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a black quartz glass consisting of a composition comprising 63 to 65 mass % of SiO2, 18 to 24 mass % of TiO2, and 12 to 17 mass % of Al2O3, wherein the sum of SiO2, TiO2 and Al2O3 is 100 mass %; and to a method for producing black quartz glass comprising: mixing 63 to 65 mass % of a SiO2 powder, 18 to 24 mass % of a TiO2 powder and 12 to 17 mass % of an Al2O3...