ALEXANDRIA, Va., May 12 -- United States Patent no. 12,623,963, issued on May 12, was assigned to ARDEX Group GmbH (Witten, Germany).
"Use of a hydraulic binder containing calcium aluminate for the production of a construction material" was invented by Stephen Alan Brooks (Suffolk, Great Britain), Rudiger Oberste-Padtberg (Wuppertal, Germany), Jorg Sieksmeier (Essen, Germany), Hubert Motzet (Rosendahl, Germany) and Michael Pomberg (Dortmund, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to the use of a hydraulic binder containing calcium aluminate, obtainable by a method in which a) prepared amorphous residual material rich in aluminium oxide and/or aluminium hydroxide is heate...