Photographic products employing nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds capable of releasing photographically useful groups
US4619884A · kind A · utility
14Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 29, 1985 |
| Grant date | Oct 28, 1986 |
| Priority date | — |
| Expiry date | Jul 29, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic elements and assemblages are described which employ nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds which are capable of releasing photographically useful groups in an imagewise manner as a function of silver halide development.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.