US Patent Issued to JFE STEEL on Feb. 25 for "Cold rolled steel sheet for zirconium-based chemical conversion treatment, method for producing same, zirconium-based chemical conversion-treated steel sheet, and method for producing same" (Japanese Inventors)

ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,234,556, issued on Feb. 25, was assigned to JFE STEEL Corp. (Tokyo).

"Cold rolled steel sheet for zirconium-based chemical conversion treatment, method for producing same, zirconium-based chemical conversion-treated steel sheet, and method for producing same" was invented by Hayato Takeyama (Tokyo) and Takeshi Matsuda (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a low-cost cold rolled steel sheet for zirconium-based chemical conversion treatment that contains Si and Mn and has excellent zirconium-based chemical convertibility even when a relatively large amount of Si-based oxide and Si-Mn-based oxide exists on the steel sheet surfac...