The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 12, 2025
Filed:
Jan. 27, 2022
Azo iron complex dye, ink composition containing same, and method for producing azo iron complex dye
Orient Chemical Industries Co., Ltd., Osaka, JP;
Masakazu Taniguchi, Neyagawa, JP;
Keigo Kanbara, Neyagawa, JP;
Hayato Inaba, Neyagawa, JP;
Kaori Sato, Neyagawa, JP;
ORIENT CHEMICAL INDUSTRIES CO., LTD., Osaka, JP;
Abstract
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 following chemical formula (1) (in the chemical formula (1), Rand Rare each independently a straight or branched alkyl group having 3-10 carbon atoms, Ris an electron-withdrawing group, Ris a straight or branched alkyl group having 1-5 carbon atoms or a straight or branched alkoxy group having 1-5 carbon atoms, Ris a nitro group, a sulfonamide group or a halogen atom, Ris a hydrogen atom, a straight or branched alkyl group having 1-8 carbon atoms, a nitro group or a halogen atom, Ris a hydrogen atom or a straight or branched alkyl group having 3-12 carbon atoms, and Ais a monovalent cation).