Photographic material containing a new type of hydrazide
US5558974A · kind A · utility
3Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1995 |
| Grant date | Sep 24, 1996 |
| Priority date | — |
| Expiry date | Mar 7, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/061
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A new type of hydrazide compounds is disclosed corresponding to general formula (A): ##STR1## the symbols of which are explained in the description. Examples of synthesis are given. Incorporation of these diacyl hydrazides into the silver halide emulsion layer(s) of a photographic material causes a significant increase in sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.