Patent · US Expired

Photosensitive photographic silver halide recording material

US4738919A · kind A · utility

3Cited by

7References

5Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Gerd Krauss · Leverkusen, DE
Gunter Renner · Bensberg, DE
Erich Wolff · Solingen, DE
Hans Langen · Frechen, DE
Werner Krafft · Leverkusen, DE

Key dates

Filing date	Dec 11, 1986
Grant date	Apr 19, 1988
Priority date	—
Expiry date	Dec 11, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG03C7/3012
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A photographic recording material containing at least one pyrazolone in at least one non-photosensitive layer I, a compound Sc, which reacts with the oxidation product of a p-phenylene diamine developer to form substantially colorless products and which is contained in a non-photosensitive layer which is not separated from the layer I by a photosensitive silver halide emulsion layer, shows improved protection against formaldehyde.

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