ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,428,353, issued on Sept. 30, was assigned to ROMAN CEMENT LLC (Salt Lake City).

"Classification and recombination of different SCM and cement fractions to efficiently manufacture cement-SCM compositions" was invented by John M. Guynn (Salt Lake City).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods and systems for efficiently manufacturing particulate blending materials for use in making particle size optimized cements, SCMs, blended cements and cement-SCM blends. An initial hydraulic cement or SCM having an initial particle size distribution (PSD), an initial d10, and an initial d90 is processed using one or more air classifiers, and optionally o...