ALEXANDRIA, Va., July 21 -- United States Patent no. 12,686,927, issued on July 21, was assigned to General Electric Co. (Evendale, Ohio).

"Low thermal conductivity, high toughness TBC compositions" was invented by Mohandas Nayak (Bangalore, India), Sundeep Kumar (Bangalore, India), Joshua R. Salisbury (Albany, N.Y.), Arundhati Sengupta (Bangalore, India), Narayanan Janakiraman (Bangalore, India), Vipin Raju S (Bangalore, India) and Julie Marie Kuhn (Cincinnati).

According to the abstract* released by the U.S. Patent & Trademark Office: "A composition is provided of a rare earth-doped zirconium oxide having a tetragonal structure and having a formula: YaLnbTaxNbzZr1-a-b-x-zO2-Delta where Ln is a rare earth element or a mixture of rare ear...