ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,729,156, issued on Sept. 8, was assigned to FELS-WERKE GMBH (Goslar, Germany).

"Apparatus and process for production of burnt lime or dolomite" was invented by Tino Redemann (Wernigerode, Germany), Gerrit Dombrowski (Cramme, Germany) and Henning Weber (Wolfenbuttel, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for production of burnt lime or dolomite has: a shaft furnace having a preheating zone, a reaction zone, a separation zone and a cooling zone; a first feed apparatus for CO2 at the boundary of the separation zone to the reaction zone; a first removal apparatus at the boundary of the cooling zone to the separation zone; a sec...