US Patent Issued to EPIROC DRILLING TOOLS AKTIEBOLAG on July 1 for "Rock drill insert and method for manufacturing a rock drill insert" (Swedish Inventor)

ALEXANDRIA, Va., July 3 -- United States Patent no. 12,345,097, issued on July 1, was assigned to EPIROC DRILLING TOOLS AKTIEBOLAG (Fagersta, Sweden).

"Rock drill insert and method for manufacturing a rock drill insert" was invented by Tomas Rostvall (Stockholm).

According to the abstract* released by the U.S. Patent & Trademark Office: "A rock drill insert a substrate having a tip portion and a base portion, wherein the tip portion includes a polycrystalline diamond (PCD) structure bonded to the substrate. The substrate is formed of a cemented carbide comprising at least 5 wt.-% of a metallic binder. At a distance of 50 micro metre from a surface of the base portion of the substrate, at least 20 vol.-% of the metallic binder is present i...