ALEXANDRIA, Va., Dec. 16 -- United States Patent no. 12,496,651, issued on Dec. 16, was assigned to Shanghai University of Engineering Science (Shanghai).

"Method for determining magnetic field parameter threshold of negative-pressure arc welding" was invented by Ying Wang (Shanghai), Jian Luo (Shanghai), Riping Cheng (Shanghai), Kanghui Zheng (Shanghai) and Kefeng Xu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure provides a method for determining a magnetic field parameter threshold of negative-pressure arc (NPA) welding including the following steps: forming a control equation using the Navier-Stokes equation, heat transfer equation, and Maxwell's electromagnetic equation; ...