ALEXANDRIA, Va., July 16 -- United States Patent no. 12,358,091, issued on July 15, was assigned to Hilti AG (Schaan, Liechtenstein).

"Device for extracting drilling sludge and the use thereof" was invented by Lionel Barbier (Kaufering, Germany), Stefan Franz (Augsburg, Germany), Georg Holzmeier (Marktoffingen, Germany), Matthias Mazur (Hamburg, Germany), Paul Fally (Hamburg, Germany) and Eduard Sever (Ludesch, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device for extracting drilling sludge for use at difficult to access locations on a building site includes a main body. The main body has a cavity on a lower side of the main body and a drilling sludge that is disposed in the cavity during a use...