Silver halide emulsions containing 2-pyrazolon-5-one photographi

Details Silver halide emulsions containing 2-pyrazolon-5-one photographi Silver halide emulsions containing 2-pyrazolon-5-one photographi

1974-03-18

1976-03-30

Brown, J. Travis

Gas separation: apparatus

Electric field separation apparatus

And serially arranged nonelectrical separator

96 566, 96100, G03C 700, G03C 140

Patent

active

039472728

ABSTRACT:
Novel magenta forming colour couplers for use in silver halide colour photography are described which correspond to the formula: ##EQU1## wherein R.sub.1 represents hydrogen, alkyl or aryl; R.sub.2 represents fluoroalkyl, cyanoalkyl or phenyl; X is hydrogen or a displaceable group; Ar represents phenylene and Y represents alkyl, aryl, alkylamino, arylamino or alkylarylamino.

REFERENCES:
patent: 2343703 (1944-03-01), Porter et al.
patent: 3462270 (1969-08-01), Eynde et al.
patent: 3563745 (1971-02-01), Eynde et al.
patent: 3567449 (1971-03-01), Eynde et al.

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