ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,434,448, issued on Oct. 7.
"Pre-stressed pultruded glass fiber reinforced lumber" was invented by Mark A. Porter (Jacksonville, Fla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pre-stressed pultruded glass fiber reinforced thermoplastic lumber suitable for demanding construction environments, particularly marine and outdoor applications, features a solid core composed of a thermoplastic, such as PVC, blended with 15% to 40% by weight of pelletized chopped strand glass fibers. Pre-tensioned elongated continuous fiber reinforcements are embedded within and coextensive with this core via pultrusion. The presence of pelletized and fragmented glass fiber...