ALEXANDRIA, Va., June 12 -- United States Patent no. 12,297,156, issued on May 13, was assigned to Dyno Nobel Inc. (Salt Lake City).

"Mechanically gassed emulsion explosives and related methods and systems" was invented by John Halander (Salt Lake City), Casey L. Nelson (Murray, Utah), Jeremiah R. Beagley (Huntington, Utah) and Cornelis Kome (Salt Lake City).

According to the abstract* released by the U.S. Patent & Trademark Office: "Emulsion explosives with gas bubbles that are resistant to in-borehole migration or coalescence are disclosed herein. Such emulsions can be sensitized by mechanically introducing gas bubbles into the emulsion. Gassing can be performed at any of multiple points from initial formation of the emulsion to deliver...