US Patent Issued to DALIAN UNIVERSITY OF TECHNOLOGY on March 4 for "Method for measuring thickness, roughness and interface stiffness of coating layer using ultrasonic phase derivative spectrum" (Chinese Inventors)

ALEXANDRIA, Va., March 5 -- United States Patent no. 12,241,871, issued on March 4, was assigned to DALIAN UNIVERSITY OF TECHNOLOGY (Dalian, China).

"Method for measuring thickness, roughness and interface stiffness of coating layer using ultrasonic phase derivative spectrum" was invented by Zhiyuan Ma (Dalian, China) and Li Lin (Dalian, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "The method for measuring thickness, roughness and interface stiffness of coating layer by using ultrasonic phase derivative spectrum which relates to technical field of the ultrasonic non-destructive testing. The method adopts an ultrasonic detection system which includes a sample of the coating layer, an ultrasonic flat p...