ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,540, issued on April 29, was assigned to Monolith Materials Inc. (Lincoln, Neb.).

"Carbon black generating system" was invented by Ned J. Hardman (Lincoln, Neb.), Roscoe W. Taylor (Kingwood, Texas), Robert J. Hanson (Lincoln, Neb.) and Peter L. Johnson (Mountain View, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Apparatus and process for the continuous production of carbon black or carbon containing compounds. The process is performed by converting a carbon containing feedstock, including generating a plasma gas with electrical energy, accelerating the plasma gas through a nozzle, whose diameter is narrowing in the direction of the plasma ga...