Color-forming carboxamidonaphthalene dye precursor and carboximide dye in photographic material and process
US4423126A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1982 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | May 27, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/156
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A new color-forming 4-(4'-secondary or tertiary-amino)anilino-1-carboxamidonaphthalene dye precursor in a photographic material and process enables formation of a dye image by means of cross-oxidation without the need for a coupling reaction. The color-forming 4-(4'-secondary or tertiary-amino)anilino-1-carboxamidonaphthalene dye precursor is useful in a photographic silver halide material for producing (i) a dye image, or (ii) a dye image and silver image. The exposed photographic material is processed to produce (a) a positive dye image, (b) a negative dye and negative silver image, (c) a negative dye image or (d) a positive dye image and a positive silver image. New naphthoquinoneimide dyes are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.