US Patent Issued to SUMITOMO ELECTRIC HARDMETAL on Sept. 30 for "Diamond cutting tool and method for manufacturing the same" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,583, issued on Sept. 30, was assigned to SUMITOMO ELECTRIC HARDMETAL CORP. (Hyogo, Japan).

"Diamond cutting tool and method for manufacturing the same" was invented by Akihiko Ueda (Hyogo, Japan), Naoki Watanobe (Hyogo, Japan) and Satoru Kukino (Hyogo, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is provided a diamond cutting tool including a cutting edge portion containing single crystal diamond or binderless polycrystalline diamond and graphite, wherein when Raman spectroscopy is performed on a surface of the cutting edge portion, a ratio R1 of Ig1 to a sum of Id1 and the Ig1 is equal to or more than 0.5 and equal to or less than 1,...