ALEXANDRIA, Va., March 26 -- United States Patent no. 12,259,186, issued on March 25, was assigned to MACRAE TECHNOLOGIES INC. (Hayward, Calif.).

"Single mounting cast iron or copper stave cooler" was invented by Allan J. MacRae (Hayward, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "All of a cast-iron or cast-copper stave cooler's weight is supported inside a furnace containment shell by single gas-tight steel collar on the backside. All the coolant piping in each cooler has every external connection collected and routed together through the one steel collar. A wear protection barrier is disposed on the hot face. Such is limited to include at least one of horizontal rows of ribs and channels that re...