Patent · US Expired

Color photographic silver halide material

US6045989A · kind A · utility

2Cited by

6References

11Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Cuong Ly · Cologne, DE
Ralf Weimann · Leverkusen, DE

Key dates

Filing date	Jul 24, 1998
Grant date	Apr 4, 2000
Priority date	—
Expiry date	Jul 24, 2018

Classification

Technology area (CPC G)Physics
CPC primaryG03C2001/092
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A color photographic silver halide material having a support and at least one light-sensitive silver halide emulsion layer, the silver halide of which consists of at least 95 mole % of AgCl, and which contains a magenta coupler of formula (I) wherein PA1 R denotes H or a group which is split off under the conditions of chromogenic development, PA1 R.sub.1 denotes alkyl, which is optionally substituted, and PA1 R.sub.2 denotes R.sub.1 or aryl, wherein the sum of all the C atoms of the R.sub.1 and R.sub.2 radicals in a coupler molecule is at least 12, and wherein the silver halide contains mercury, is distinguished by improved latent image stability.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.