Redox dye releasers o-sulfonamidophenol

Details Redox dye releasers o-sulfonamidophenol Redox dye releasers o-sulfonamidophenol

1976-03-26

1977-10-25

Klein, David

Gas separation: apparatus

Electric field separation apparatus

Including gas flow distribution means

96 3, 96 29D, 96 74, 96 77, 96 99, 96100R, G03C 140, G03C 700, G03C 176, G03C 110

Patent

active

040554287

ABSTRACT:
A color photographic material for, in particular, a color diffusion transfer process having at least one silver halide emulsion layer having associated therewith a dye releasing redox compound shown by the formula ##STR1## wherein G represents a hydroxyl group or a group yielding a hydroxyl group by hydrolysis, Col represents a dye or a group yielding a dye by hydrolysis, R represents an alkyl group or an aromatic group, X represents a substituent comprising an electron donating group or substituents, which may be same or different, at least one of which comprises an electron donating group, and n is 1, 2, or 3, where X moieties may form a condensed ring (excluding an aromatic hydrocarbon ring) with each other or with OR, wherein the total carbon number of Xn and R is more than 8.

REFERENCES:
patent: B351673 (1975-01-01), Fleckenstein et al.
patent: 2306410 (1942-12-01), Schinzel
patent: 3227550 (1966-01-01), Whitmore et al.
patent: 3751406 (1973-08-01), Bloom
"Photographic Systems", Research Disclosure No. 13024, Feb. 1975.

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