ALEXANDRIA, Va., March 17 -- United States Patent no. 12,577,881, issued on March 17, was assigned to Rolls-Royce Corp. (Indianapolis).

"Turbine shroud assemblies with anti-migration seals" was invented by Aaron D. Sippel (Indianapolis), Ted J. Freeman (Indianapolis), David J. Thomas (Indianapolis), Clark J. Snyder (Indianapolis), Grant Cook (Indianapolis) and James E. Shellhorn (Indianapolis).

According to the abstract* released by the U.S. Patent & Trademark Office: "A turbine shroud assembly includes a carrier segment, a blade track segment, and a buffer air seal assembly. The carrier segment includes a cantilevered wall extending radially inwardly within a recess so as to form a groove between the cantilevered wall and the inner wall ...