US Patent Issued to SUMITOMO ELECTRIC HARDMETAL, Sumitomo Electric Industries on Sept. 8 for "Cubic boron nitride sintered material and tool" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,164, issued on Sept. 8, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Hyogo, Japan) and Sumitomo Electric Industries Ltd. (Osaka, Japan).

"Cubic boron nitride sintered material and tool" was invented by Ryosuke Sakon (Hyogo, Japan), Yuya Kishida (Osaka, Japan), Yu Kawamura (Osaka, Japan), Yusuke Matsuda (Hyogo, Japan), Machiko Abe (Osaka, Japan), Hironari Moroguchi (Osaka, Japan) and Akito Ishii (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cubic boron nitride sintered material includes: 40 to 80 volume % of cubic boron nitride grains; and 20 to 60 volume % of a binder phase, wherein an average grain size d of the cubic boron n...