US Patent Issued to ORIENT CHEMICAL INDUSTRIES on Aug. 12 for "Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye" (Japanese Inventors)

ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,384,920, issued on Aug. 12, was assigned to ORIENT CHEMICAL INDUSTRIES Co. LTD. (Osaka, Japan).

"Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye" was invented by Masakazu Taniguchi (Neyagawa, Japan), Keigo Kanbara (Neyagawa, Japan), Hayato Inaba (Neyagawa, Japan) and Kaori Sato (Neyagawa, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An azo iron complex dye which does not contain harmful heavy metals, exhibits sufficient solubility in organic solvents for practical use, and exhibits an excellent black color. The azo iron complex dye contains a disazo-monoazo iron complex represented by the foll...