ALEXANDRIA, Va., April 15 -- United States Patent no. 12,600,667, issued on April 14, was assigned to NIPPON ELECTRIC GLASS Co. LTD. (Shiga, Japan).
"Glass sheet for chemical strengthening, manufacturing method of strengthened glass sheet, and glass sheet" was invented by Shigeyoshi Ito (Shiga, Japan) and Masashi Kosugi (Shiga, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "In a glass sheet 12 for chemical strengthening having a thickness of 0.1 mm or less, the glass sheet 12 has a warped shape as a whole or includes a warped part in a portion thereof. When the glass sheet 12 is placed on a horizontal surface with one main surface 12a facing upward, a first peak position D1 is present in a part inside ...