ALEXANDRIA, Va., June 16 -- United States Patent no. 12,304,875, issued on May 20, was assigned to Toto Ltd. (Fukuoka, Japan).
"Plasma-resistant member" was invented by Junichi Iwasawa (Fukuoka-ken, Japan) and Toshihiro Aoshima (Fukuoka-ken, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "According to an aspect of the invention, there is provided a plasma-resistant member including: a base member; and a layer structural component formed at a surface of the base member, the layer structural component including an yttria polycrystalline body and being plasma resistant, the layer structural component including a first uneven structure, and a second uneven structure formed to be superimposed onto the first ...