ALEXANDRIA, Va., June 9 -- United States Patent no. 12,649,972, issued on June 9, was assigned to DIPSOL CHEMICALS Co. LTD. (Tokyo).
"Chemical conversion treatment solution, chemical conversion treatment method in which same is used, and chemical conversion coating" was invented by Ryuta Kashio (Chiba, Japan), Masatoshi Ishikawa (Chiba, Japan) and Tomitaka Yamamoto (Chiba, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention addresses the problem of providing a chemical conversion treatment solution that contains zirconium ions and that makes it possible to form a highly corrosion-resistant chemical conversion coating formed with consideration for the environment as well. The present in...