Patent · US Expired

Color photographic material with homophthalimide thioether development inhibitor

US4046574A · kind A · utility

4Cited by

8References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Heinrich Odenwalder · Leverkusen, DE
Erwin Ranz · Leverkusen, DE
Walter Puschel · Leverkusen, DE
Hans Vetter · Kempten (Allgäu), DE

Key dates

Filing date	Jan 20, 1976
Grant date	Sep 6, 1977
Priority date	—
Expiry date	Jan 20, 1996

Classification

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

Abstract

A color photographic material having a silver halide emulsion layer and containing a thioether compound which is reactable on chromogenic development thereby releasing a diffusible substance which inhibits the development of the silver halide. The thioether compound is a homophthalimide containing a removable mercapto group containing moiety in the 4-position and its nitrogen in the 2-position atom being a tertiary nitrogen.

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