US Patent Issued to Nissin Manufacturing Group on June 3 for "Cubic boron nitride polycrystallite and method for producing the same" (Japanese Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,319,569, issued on June 3, was assigned to Nissin Manufacturing Group Co. Ltd (Kyotango, Japan).

"Cubic boron nitride polycrystallite and method for producing the same" was invented by Yoshio Ichida (Kyotango, Japan), Tetsuo Irifune (Matsuyama, Japan), Hiroaki Ohfuji (Sendai, Japan) and Yasuo Tomita (Kyotango, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cubic boron nitride (cBN) polycrystallite includes: a fine-grained cBN crystal of 10-60 nm in grain size; a coarse-grained cBN crystal of 100-250 nm in grain size; and a lamellar crystal consisting of stacked plate-like crystals of cBN with the maximum length perpendicular to the stacking direc...