ALEXANDRIA, Va., March 31 -- United States Patent no. 12,590,033, issued on March 31, was assigned to Hilti AG (Schaan, Liechtenstein).
"Finely ground portland cement clinker in a cementitious multi-component mortar system for use as an inorganic chemical fastening system" was invented by Markus Schonlein (Gilching, Germany), Armin Pfeil (Landsberg am Lech, Germany), Bernhard Middendorf (Calden, Germany) and Tim Schade (Kassel, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A cementitious multi-component mortar system contains finely ground Portland cement clinker with a grinding fineness in the range of from 6,000 to 12,000 cm2/g. The cementitious multi-component mortar system can be used as an inor...