ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,543, issued on June 30, was assigned to SIKA TECHNOLOGY AG (Baar, Switzerland).

"Dry grinding of steel making slag, ground steel making slag, and its use in construction materials" was invented by Jerome Soudier (Vaux en Bugey, France), Olivier Levesque (Cremieu, France), Javier Quesada (Madrid), Joris Gouy-Pailler (Lyons, France) and Ramiro Garcia (Madrid).

According to the abstract* released by the U.S. Patent & Trademark Office: "The use of a grinding additive during the dry grinding of steel making slag, characterized in that the grinding additive is selected from the group consisting of alkanolamines, glycols, glycerol, sugars, sugar acids, carboxylic acids or their salts, s...