ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,738, issued on Oct. 21, was assigned to SOIL-NAIL HOLDINGS LLC (Commerce City, Colo.).
"System and method for subgrade stabilization of railroad bed" was invented by Tomasz Szynakiewicz (Golden, Colo.), Justin Anderson (Lexington, Ky.) and Robert W. Hollinger (Arvada, Colo.).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention is a system and method for repairing, improving, and stabilizing subgrade and subsoil/natural ground layers of a rail bed generally consisting of softer soils. One embodiment includes a method of installing subsurface inclusions and ballast fills comprising injected slurry mixtures of stabilizing material such as cement...