ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,498,506, issued on Dec. 16, was assigned to SHIN-ETSU CHEMICAL Co. LTD. (Tokyo).

"Window material for optical element, lid for optical element package, optical element package, and optical device" was invented by Harunobu Matsui (Joetsu, Japan), Daijitsu Harada (Joetsu, Japan), Masao Ando (Joetsu, Japan) and Masaki Takeuchi (Joetsu, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "The window material for an optical element of the present invention is formed of synthetic quartz glass that is likely to be subjected to shape processing, can be manufactured at low cost, and has a flat plate shape. Even if the window material for an optical element has a...