Filter dyes for rapid processing applications
US5344749A · kind A · utility
12Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 1993 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Sep 10, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/167
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The synthesis and the application of new dyes is described, said new dyes being incorporated in non-migratory state in hydrophilic colloid layers of photographic materials wherefrom they can be rapidly removed after being quickly decolorized in alkaline aqueous liquids used in the processing of said materials. The filter dyes have an amide function or a derivative therefrom as a substituent at the mono- or trimethine chain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.