Concentrated photographic color developing composition containing stain reducing agent
US6509143B2 · kind B2 · utility
0Cited by
8References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2001 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Jun 29, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/421
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Concentrated aqueous photographic color developing compositions include a photographic color developing agent in free base form and a compound represented by Structure I wherein R is carboxy or sulfo, m is an integer of from 0 to 7, and n is an integer of from 2 to 5. These compositions can be used to provide images in color silver halide photographic materials with reduced residual sensitizing dye stain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.