Method of forming a photographic color image
US6410216B1 · kind B1 · utility
1Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1994 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Jul 14, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C7/3815
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Method of forming a photographic color image which comprises imagewise exposing a photographic silver halide color material and processing it with an alkaline processing solution in the presence of a sulphonhydrazide color developing agent and a 3-pyridinol color coupler optionally containing in the 2-position a ballasting group of such size and configuration as to render the coupler non-diffusible in photographic materials thus forming a dye image by reaction of the oxidized color developing agent and the color coupler.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.