ALEXANDRIA, Va., May 12 -- United States Patent no. 12,624,648, issued on May 12, was assigned to General Electric Co. (Evendale, Ohio).

"Fire retardant engine casing apparatus" was invented by Manish Singhal (Bengaluru, India), Vishnu Das K (Bengaluru, India), Sagar Pradhan (Bengaluru, India) and Ravindra Shankar Ganiger (Bengaluru, India).

According to the abstract* released by the U.S. Patent & Trademark Office: "Fire retardant engine casing apparatus are disclosed. An example engine casing includes an inner shell circumferentially surrounding blades of a fan, a compressor, or blades of a turbine, the inner shell including perforations to receive acoustic waves, an outer shell positioned around the inner shell, a fire retardant materia...