ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,636, issued on Nov. 3, was assigned to Rolls-Royce plc (London).

"Cooling ring for combustor system" was invented by Jason Krawciw (Derby, Great Britain), Carl L. Muldal (Derby, Great Britain), Bharat R. Koli (Derby, Great Britain), William Southgate (Derby, Great Britain) and Daniel J. Newman (Derby, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A cooling ring for a combustor system having an inner wall, an outer wall spaced apart from the inner wall, and a discharge nozzle disposed downstream of the inner wall includes an upstream portion disposed adjacent to the outer wall, a downstream portion spaced apart from the upstream portion...