Development inhibitor precursor and a photographic element conta

Details Development inhibitor precursor and a photographic element conta Development inhibitor precursor and a photographic element conta

1979-04-03

1981-01-20

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430544, 430559, 430564, 430957, G03C 140, G03C 110, G03C 530

Patent

active

042463335

ABSTRACT:
A photographic element having on a support at least one silver halide emulsion layer having associated therewith a development inhibitor precursor represented by the formula (I) ##STR1## wherein A is a phenyl group, a substituted phenyl group or a 5- or 6-membered nitrogen-containing heterocyclic ring; said A splitting together with the sulfur atom in the above molecule from the residue of the molecule to provide a silver halide development inhibitor; R.sup.1 is an alkyl group having 1 to 4 carbon atoms; and R.sup.2 is a cyano group, a carbamoyl group or the group represented by the formula ##STR2## wherein R.sup.3 is an aryl group.

REFERENCES:
patent: 3260597 (1966-07-01), Weyerts et al.
patent: 3839041 (1974-10-01), Hiller
patent: 4009029 (1977-02-01), Hammond et al.

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