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US 5,326,866 AGranted
Liquid azo dye and ink composition containing the same
AssigneeOrient Chemical Industries, Ltd.
InventorsTakashi Ono, Tatsuya Yagyu, Tetsui Akase
Life of this patent
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Abstract
A liquid azo dye represented by the formula: ##STR1## (wherein, A stands for a phenylene group which may have a substituent, n is o or 1, Cp is a pyrazolone derivative residue or a naphthol derivative residue, X is --NH-- or --COO-- and R is an alkyl group having 3 to 12 carbon atoms).
Claims5
A liquid azo dye represented by the formula:
- ##STR17## (wherein, A stands for a phenylene group which may have a substituent, n is o or 1, Cp is a pyrazolone derivative residue or a naphthol derivative residue, X is --NH-- or --COO-- and R is an alkyl group having 3 to 12 carbon atoms).
The liquid azo dye represented by the formula:
- ##STR18##
Dependencies are inferred from the claim text.