US Patent Issued to ArcelorMittal on July 1 for "Method and apparatus for determining the health and remaining service life of austenitic steel reformer tubes and the like" (Indiana Inventors)

ALEXANDRIA, Va., July 3 -- United States Patent no. RE50,475, issued on July 1, was assigned to ArcelorMittal (Luxembourg).

"Method and apparatus for determining the health and remaining service life of austenitic steel reformer tubes and the like" was invented by Michael A. Masleid (Dyer, Ind.), Zofia E. Niemczura (Porter, Ind.) and George B. Tsvik (Valparaiso, Ind.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Testing methods and apparatus for testing the health of steel tubes used in reformers and other tubes and pipes used in other high temperature applications. The method includes the steps of transmitting two sinusoidal electromagnetic signals, each having a different frequency F1 and F2, into the ref...