Patent · US Expired

Photographic silver halide material

US5270157A · kind A · utility

8Cited by

5References

7Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Peter Bell · Neunburg vorm Wald, DE
Cuong Ly · Cologne, DE

Key dates

Filing date	Sep 28, 1992
Grant date	Dec 14, 1993
Priority date	—
Expiry date	Sep 28, 2012

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/158
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A colour photographic silver halide material having at least one silver halide emulsion layer which contains at least one colour coupler and in which the silver halide grains contain from 40 to 90 mol. % of AgCl and at least two zones differing in halide composition, the chloride content of the outer zone being at least 10 mol. % higher than that of the inner zone, which silver halide emulsion layer is associated with a DIR compound whose reaction with the oxidized colour developer has a rate constant k>2000 [1/mol.s] is distinguished by excellent sharpness and colour reproduction even when processed by a high speed process.

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