ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,029, issued on Feb. 24, was assigned to DIAROTECH S.A. (Fleurus, Belgium).
"Rock-cutting tool and method for mine and oil drilling" was invented by Robert Delwiche (Uccle, Belgium) and Etienne Lamine (Court-Saint-Etienne, Belgium).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a rock-cutting tool and a method for manufacturing this tool, which comprises knives comprising a layer of polycrystalline synthetic diamond (PSD), a diamond impregnation layer with diamond particles and bonding cobalt, characterized in that the PSD layer is supported directly, along a planar interface, on the diamond impregnation layer whose interface ...