Photographic processing compositions containing stain reducing agent
US6395461B1 · kind B1 · utility
2Cited by
11References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Feb 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/38
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Specific aromatic compounds having an extended planar &pgr; system are useful as spectral sensitizing dye stain reducing agents in photographic processing compositions and methods for providing color or black-and-white images in various photographic silver halide materials. These compounds are devoid of diaminostilbene fragments or fused triazole nuclei. They are particularly useful in fixing and bleaching compositions in the processing of color photographic silver halide materials, but can also be used in various other processing compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.