US Patent Issued to CORNING on June 17 for "Glass and glass ceramic composite and method" (Pennsylvania, New York Inventors)

ALEXANDRIA, Va., June 19 -- United States Patent no. 12,330,980, issued on June 17, was assigned to CORNING Inc. (Corning, N.Y.).

"Glass and glass ceramic composite and method" was invented by Indrajit Dutta (Horseheads, N.Y.) and Nicholas James Smith (Port Matilda, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A glass glass-ceramic composite comprises a substrate comprising an alkali-containing glass bulk, the bulk comprising Al2O3 and SiO2 and alkali, and a glass-ceramic surface layer, the surface layer comprising an alkali-depleted glass ceramic comprising Al2O3 and SiO2 with at least 5% crystalline phase by volume, wherein the alkali-depleted glass ceramic surface layer comprises a mol % Al2O3 of at...