Magenta-colored cyan-forming couplers
United States Patent 3034892

Inventors:
Gledhill, Ronald J.
John, Williams
Publication Date:
05/15/1962
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Assignee:
EASTMAN KODAK CO
Primary Class:
Other Classes:
534/648, 430/553, 534/865, 430/562, 430/391, 430/385
International Classes:
G03C7/333; G03C7/34
US Patent References:
2756225Acid monoazo dyestuffs
Foreign References:
HU140359A