ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,881, issued on March 25, was assigned to RTX Corp. (Farmington, Conn.).

"Turbine section with ceramic support rings and ceramic vane arc segments" was invented by Howard J. Liles (Newington, Conn.) and Bryan P. Dube (Columbia, Conn.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A turbine section for a gas turbine engine includes inner and outer diameter ceramic matrix composite (CMC) support rings that define a gaspath there between. Each of the inner and outer diameter CMC support rings are monolithic and continuous. CMC vane arc segments are disposed in the gaspath and supported by the inner and outer diameter CMC support rings. Each of the CMC ...