Incorporated carboxy substituted p-phenylenediamine color develo

Details Incorporated carboxy substituted p-phenylenediamine color develo Incorporated carboxy substituted p-phenylenediamine color develo

1974-12-10

1978-01-03

Klein, David

Gas separation: apparatus

Electric field separation apparatus

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

96 3, 96 55, 96 562, 96 563, 96 564, 96 565, 96 66R, 96 66HD, 96 74, 96 77, 96 95, 96100R, G03C 554, G03C 700, G03C 140, G03C 530

Patent

active

040664562

ABSTRACT:
A derivative of paraphenylenediamine, for use as a color developer, having a primary amino group available for oxidative coupling, and a carboxy group bound to the benzene ring to provide the compound with the required stability to enable the compound to be incorporated into a photographic film, the compound being non-diffusible during development of the photographic film in an alkaline processing solution.

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patent: 3728116 (1973-02-01), Waxman et al.
patent: 3779756 (1973-12-01), Farran et al.

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