Patent · US Expired

Polymeric couplers and light-sensitive photographic silver halide recording material containing such couplers

US4756998A · kind A · utility

5Cited by

4References

8Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Gunter Helling · Siegburg, DE
Friedrich-Wilhelm Kunitz · Wermelskirchen, DE
Hans Langen · Frechen, DE

Key dates

Filing date	Oct 3, 1986
Grant date	Jul 12, 1988
Priority date	—
Expiry date	Oct 3, 2006

Classification

Technology area (CPC G)Physics
CPC primaryG03C7/3275
WIPO fieldOptics
WIPO sectorInstruments

Abstract

Polymeric couplers with recurring units which contain at least one urethane and/or urea group, are suitable for the production of improved photographic recording materials.

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