ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,119, issued on April 15, was assigned to Diamond Innovations Inc. (Worthington, Ohio).

"Iron gradient in polycrystalline diamond compacts; blanks, cutters and cutting tools including same; and methods of manufacture" was invented by Kiran Adepalli (Westerville, Ohio).

According to the abstract* released by the U.S. Patent & Trademark Office: "Polycrystalline diamond compacts, polycrystalline diamond blanks, polycrystalline diamond cutters, and tools incorporating same for cutting, milling, grinding, drilling and other abrasive operations, particularly in metal cutting applications, include a diamond table having a gradient in iron content that increases as distance into the volume...