Title:
Yellow-colored magenta-forming couplers
United States Patent 3005712
Inventors:
George, Saunders David
Bowes, Knott Edward
Publication Date:
10/24/1961
Export Citation:
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Assignee:
EASTMAN KODAK CO
Primary Class:
430/549
Other Classes:
430/554, 430/555, 430/558, 430/562, 534/769
International Classes:
C07D231/52; G03C7/333; C07D231/00; G03C7/333
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US Patent References:
2725291Azo dye couplers having two coupling nuclei
2584349Color forming development with an aromatic primary amino developer and alpha-[4-sulfophenylazo]-aceto-acet-2-4-dichloroanilide
2472109Metallizable monoazo dipyrazolones
2447867Azo dyestuffs of the pyrazolone series