ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,774,853, issued on Oct. 27, was assigned to GPRE IP LLC (St. Louis).
"Rotary furnace directional fluid conduit heat control system" was invented by John M. Peterman (Troy, Mo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A directional fluid heat control system for a high temperature kiln with a process zone. The system includes two rigid, coaxially aligned tubes positioned in the kiln. One tube rotates inside the other. One tube has a series of longitudinal openings, while the other has a series of helically arranged openings. Rotating one tube selectively aligns an opening from that tube with an opening in the other. Further rotation aligns different...