ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,497,840, issued on Dec. 16, was assigned to Salvation Drilling Tools LLC (San Bernardino, Calif.).

"Method of thermal assembly of leg-cone assemblies into a rotating cone drill bit body" was invented by Gary Warwick (San Bernardino, Calif.) and Phillip Canipe (La Quinta, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method of thermal assembly of multiple leg-cone assemblies within multiple respective distally-opening leg bores of a drill bit body of a rotating cone drill bit, each leg-cone assembly having a leg body with a proximal leg shank for selective receipt within the respective leg bore, the method including the steps of (a) forming a p...