Photographic developing agents

Details Photographic developing agents Photographic developing agents

1974-12-30

1976-07-20

Kelley, Mary F.

Gas separation: apparatus

Electric field separation apparatus

Electrode cleaner, apparatus part flusher, discharger, or...

96 66HD, 96 66R, 260283S, 260286Q, 260288R, G03C 530, C07D21500, C07D21558, C07D21512

Patent

active

039704548

ABSTRACT:
A new class of photographic developing agents of the p-aminophenol type are compounds of the formula: ##EQU1## wherein R.sup.1 is an alkyl group of 1 to 12 carbon atoms;

REFERENCES:
patent: 2163820 (1939-06-01), Wilmanns et al.
patent: 2196739 (1940-04-01), Peterson
patent: 2387751 (1945-10-01), Dickey et al.
patent: 2566132 (1951-08-01), Leffler
patent: 2566259 (1951-08-01), Thirtle et al.
patent: 2886436 (1959-05-01), Schmidt et al.
patent: 3262906 (1966-07-01), Perry
patent: 3615525 (1971-10-01), Willems

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