ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,123, issued on July 8, was assigned to Robertson Intellectual Properties LLC (Mansfield, Texas).

"Borehole conduit cutting apparatus with swirl generator" was invented by Michael C. Robertson (Mansfield, Texas) and Antony F. Grattan (Arlington, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for severing a conduit in the borehole includes a combustible fuel; a nozzle section comprising a cavity with apertures providing passages from the cavity to outside the apparatus; a movable swirl generator located between the combustible fuel and the nozzle section, the swirl generator comprising a piston and a plurality of helical vanes, the p...