ALEXANDRIA, Va., July 16 -- United States Patent no. 12,668,701, issued on June 30, was assigned to Ergon Inc. (Flowood, Miss.).
"Waste tire-derived asphalt modifier" was invented by Gaylon L. Baumgardner (Jackson, Miss.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Products from waste tire pyrolysis are prepared using an initial step of i) at least partially pyrolyzing, separately from such asphaltic binder, whole rubber articles or size-reduced rubber particles to provide one or more pyrolyzed rubber fractions including a pyrolyzed oil fraction having a selected minimum initial boiling point or flash point, and ii) removing some or all polycyclic aromatic hydrocarbon (PAH) compounds from such pyrolyzed oi...