Pyrazolotriazle dye-forming photographic coupler

Details Pyrazolotriazle dye-forming photographic coupler Pyrazolotriazle dye-forming photographic coupler

1998-12-23

2000-11-07

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified radiation sensitive composition with color...

430386, 430387, G03C 108, G03C 726, G03C 732

Patent

active

06143485&

ABSTRACT:
A color photographic film or paper comprises at least one silver halide emulsion layer having associated therewith a dye-forming coupler compound of the formula ##STR1## wherein: one of Z.sub.a and Z.sub.b is --N=and the other is ##STR2## to which ring "A" is directly attached; R.sup.0 represents hydrogen or a substituent;

REFERENCES:
patent: 4621046 (1986-11-01), Sato et al.
patent: 4840886 (1989-06-01), Iijima et al.
patent: 5234805 (1993-08-01), Tang et al.
patent: 5378587 (1995-01-01), Krishnamurthy et al.
patent: 5576150 (1996-11-01), Tang et al.
patent: 5578437 (1996-11-01), Asami et al.
patent: 5597679 (1997-01-01), Yoshioka
patent: 5667952 (1997-09-01), Tang et al.

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