US Patent Issued to Kingdream, Sinopec Oilfield Equipment on Oct. 7 for "Multi-cutting-edge diamond composites and earth-boring tools" (Chinese Inventors)

ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,435,576, issued on Oct. 7, was assigned to Kingdream Public Ltd. Co. (Wuhan, China) and Sinopec Oilfield Equipment Corp. (Wuhan, China).

"Multi-cutting-edge diamond composites and earth-boring tools" was invented by Qiang Liu (Wuhan, China) and Guanfu Tu (Wuhan, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A multi-cutting-edge diamond composite includes a columnar hard alloy substrate and a diamond composite layer, the diamond composite layer being disposed at a top end of the hard alloy substrate, wherein a circumferential edge of a top end of the diamond composite layer is provided with at least two segments of different chamfers to form differ...