ALEXANDRIA, Va., March 26 -- United States Patent no. 12,258,488, issued on March 25, was assigned to OKUNO CHEMICAL INDUSTRIES Co. LTD. (Osaka, Japan).
"Film-forming treatment liquid" was invented by Taro Konuma (Osaka, Japan), Teruhiko Kagehisa (Osaka, Japan), Masafumi Nozaki (Osaka, Japan), Katsumasa Shimahashi (Osaka, Japan) and Takashi Kato (Osaka, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An object of the present invention is to provide a treatment liquid and a treatment method that are capable of enhancing the corrosion resistance of a metal material. This object is achieved by, after forming a chemical conversion treatment film on the surface of a metal material, forming a film using a fil...