Use of Yellow couplers of the indolo [3,2-B] guinoline type in a

Details Use of Yellow couplers of the indolo [3,2-B] guinoline type in a Use of Yellow couplers of the indolo [3,2-B] guinoline type in a

1995-10-25

1996-11-12

Letscher, Geraldine

Radiation imagery chemistry: process, composition, or product th

Color imaging process

Using identified radiation sensitive composition in the...

430389, 430383, 430558, 430502, G03C 746

Patent

active

055738923

ABSTRACT:
Compounds of the formula I are suitable as photographic yellow couplers ##STR1## In formula I, Z.sub.1, Z.sub.2 mean residues to complete 5-, 6- or 7-membered rings of an aromatic or heteroaromatic nature; these rings may be substituted with substituents R.sup.1, R.sup.2, R.sup.3 and R.sup.4 ;

REFERENCES:
patent: 2186045 (1940-01-01), Schneider
patent: 2886436 (1959-05-01), Schmidt et al.
patent: 3171740 (1965-03-01), Menzel et al.
patent: 3304182 (1967-02-01), Froehuch

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