ALEXANDRIA, Va., July 16 -- United States Patent no. 12,667,901, issued on June 30, was assigned to Niterra Materials Co. Ltd. (Yokohama, Japan).

"Heat treatment furnace apparatus" was invented by Masanori Hoshino (Yokohama, Japan), Hiromasa Kato (Nagareyama, Japan) and Hideki Sato (Yokohama, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A heat treatment furnace apparatus according to an embodiment heats, when a metal plate is brazed to a ceramic substrate, at least one storage container made of stainless steel, in which a plurality of ceramic metal substrates are stored, to subject the plurality of ceramic metal substrates to a heat treatment at 600 degrees Celsius or more and less than 950 degrees C...