Pyrazolidone type developing agents

Details Pyrazolidone type developing agents Pyrazolidone type developing agents

1976-09-09

1977-08-09

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, 96 99, 96100, G03C 554, G03C 530, G03C 538, G03C 148

Patent

active

040408329

ABSTRACT:
In one embodiment, the present invention relates to novel heterocyclic compounds as represented in the following formula ##STR1## wherein R and R' each are hydrogen or alkyl, Y is .dbd.O or .dbd.NH and n is a positive integer from 1 to 7.
In another embodiment, the present invention is directed to the use of the above-denoted class of heterocyclic compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.

REFERENCES:
patent: 2983606 (1961-05-01), Rogers
patent: 3740221 (1973-06-01), Willems et al.

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