4-Hydroxypyrazole developing agents

Details 4-Hydroxypyrazole developing agents 4-Hydroxypyrazole developing agents

1976-03-30

1977-09-20

Klein, David

Gas separation: apparatus

Electric field separation apparatus

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

96 29D, 96 61M, 96 66HD, 96 76R, 96 77, 96 95, G03C 554, G03C 538, G03C 530, G03C 148

Patent

active

040494500

ABSTRACT:
Certain 4-hydroxypyrazoles are employed as silver halide developing agents which find particular utility in diffusion transfer photographic processes.

REFERENCES:
patent: 2751300 (1956-06-01), James et al.
patent: 2983606 (1961-05-01), Rogers
Pyrazoles, Pyrazolines . . . Rings, John Wiley & Sons, NY. 1967, pp. 126-128.
Nye & Tang, "Synthesis of Pyrazol-4-ols," Canadian J. of Chem. 48, 3563 1970.
Freeman et al., "The Nitrosation . . . Derivatives," J. Org. Chem. 34, 187.

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