ALEXANDRIA, Va., May 19 -- United States Patent no. 12,629,554, issued on May 19, was assigned to Kidde Technologies Inc. (Wilson, N.C.).
"Dry chemical fire suppressant for a battery pack" was invented by John W. Porterfield (Rolesville, N.C.), Robert Dunster (Slough, Great Britain), Albert C. Rouse (Prior Lake, Minn.) and Eugen Berns (Tonisvorst, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fire suppressant for cooling a battery pack includes a pressurized mixture of a dry chemical and carbon dioxide. The dry chemical is an inorganic particulate chemical. The dry chemical particles are small enough to be carried by a flow of depressurizing carbon dioxide. A mass of the dry chemical is between 5%...