ALEXANDRIA, Va., July 3 -- United States Patent no. 12,344,939, issued on July 1, was assigned to DONGGUAN DSP TECHNOLOGY Co. LTD. (Dongguan, China).
"SUS surface treatment method" was invented by Guo Tie Long (Shenzhen, China) and Tan Yonggang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A SUS surface treatment method for manufacturing a polymer-SUS joint structure having excellent bond strength is provided. A SUS surface treatment method for bonding with a polymer composite including a first etching step wherein the SUS surface is etched by acidic solution, a surface treatment step wherein the SUS surface is treated by ultrasonic wave, a second etching step wherein the SUS surface is etc...