Photographic silver dye bleach materials containing formyl-substituted azo compounds as image dyes
US4575482A · kind A · utility
1Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 14, 1983 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Nov 14, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B31/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Photographic materials which comprise, on a base, at least one layer containing an azo dyestuff of the formula ##STR1## in which R.sub.1 is hydrogen, an alkylsulfone, halogen, cyano or nitro, R.sub.2 is hydrogen, halogen, cyano or nitro, R.sub.3 is hydrogen, alkyl, halogen, cyano or nitro, B.sub.1 is an aromatic ring system, K.sub.1 is an aromatic amine and m.sub.1 is 1 or 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.