US Patent Issued to TDK, National Institute of Advanced Industrial Science and Technology on Sept. 1 for "Samarium-iron-nitrogen based magnet powder and samarium-iron-nitrogen based magnet" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,725,721, issued on Sept. 1, was assigned to TDK Corp. (Tokyo) and National Institute of Advanced Industrial Science and Technology (Tokyo).

"Samarium-iron-nitrogen based magnet powder and samarium-iron-nitrogen based magnet" was invented by Ryuji Hashimoto (Tokyo) and Shusuke Okada (Aichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A samarium-iron-nitrogen based magnet powder includes a lanthanoid (Ln), iron (Fe), bismuth (Bi), tungsten (W), and nitrogen (N), wherein the lanthanoid includes samarium (Sm), an atomic ratio of bismuth to a sum of the lanthanoid, iron, bismuth, and tungsten (Bi/(Ln+Fe+Bi+W)) is 1.00 at % or less, an atomic ratio o...