ALEXANDRIA, Va., Nov. 11 -- United States Patent no. 12,469,621, issued on Nov. 11, was assigned to American Fire Wire Inc. (Minden, Nev.).
"Fire resistant radiating coaxial cable" was invented by William E. Rogers (Danville, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fire resistant radiating coaxial cable that employs a high-silica fiberglass yarn spacer is described. The yarn material has mass fraction of silica (SiO2) between 95.0% and 96.5%, a mass fraction of aluminum oxide (Al2O3) greater than 3%, and a mass fraction of calcium oxide (CaO) less than 0.5%. The yarn can be wound in a low-helix-angle helix around the center conductor such that less than half fills the annular space between it...