Patent · US Expired

Silver halide elements with polymers containing ketoiminoguanidinium groups

US4186010A · kind A · utility

0Cited by

3References

6Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Raymond Florens · Edegem, BE
Daniel M. Timmerman · Mortsel, BE

Key dates

Filing date	Apr 11, 1975
Grant date	Jan 29, 1980
Priority date	—
Expiry date	Apr 11, 1995

Classification

Technology area (CPC G)Physics
CPC primaryG03C1/053
WIPO fieldOptics
WIPO sectorInstruments

Abstract

A photographic element is described comprising an emulsion layer of low gelatin to silver halide ratio, the emulsion comprising a polymeric compound containing recurring units with ketoiminoguanidinium groups in the side chain to reduce formation of pressure marks.

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