ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,735, issued on Dec. 23, was assigned to SENJU METAL INDUSTRY Co. LTD. (Tokyo).
"Flux and solder paste" was invented by Tsuyoshi Masaki (Tokyo), Tetsu Takemasa (Tokyo), Kazuyori Takagi (Tokyo), Tomoko Nagai (Tokyo), Yutaka Hashimoto (Tokyo), Nanako Miyagi (Tokyo), Mutsuki Kaneko (Tokyo), Megumi Hayakawa (Tokyo) and Ryo Saito (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A flux containing rosin, a solvent, a thixotropic agent, a thiol compound, and an activator, in which the thiol compound includes a compound (Tp) having a benzenethiol skeleton in which one or more hydrogen atoms on a benzene ring are substituted with a mercapto group (-SH), i...