US Patent Issued to SUMITOMO ELECTRIC HARDMETAL on Sept. 9 for "Cubic boron nitride sintered material tool" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,502, issued on Sept. 9, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Hyogo, Japan).

"Cubic boron nitride sintered material tool" was invented by Takashi Harada (Hyogo, Japan), Satoru Kukino (Hyogo, Japan) and Naoki Watanobe (Hyogo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cubic boron nitride sintered material tool contains a plurality of cBN grains. cBN grains located on a surface of the cutting edge contain a cubic boron nitride phase, and a hexagonal boron nitride phase. When a ratio IPi*/ISigma* between an intensity of a Pi* peak derived from a Pi bond of hBN in the hexagonal boron nitride phase and an intensity of a Sigma* p...