ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,965, issued on May 12, was assigned to METTEN Technologies GmbH & Co. KG (Overath, Germany).
"Concrete element and method for its production" was invented by Guido Volmer (Erwitte, Germany) and Michael Metten (Bergisch Gladbach, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "What is shown and described is a concrete element including a core concrete layer and a face concrete layer, the face concrete layer being obtained by compacting and hardening a mixture containing a latent hydraulic binder and/or a pozzolanic binder, water, a granular material and an alkaline hardener, with the granular material having, at a screen hole width of 2 mm, a t...