Succinic acid derivative degradable chelants, uses and compositions thereof
US5691120A · kind A · utility
2Cited by
2References
54Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1997 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Jan 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C5/38
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Aminosuccinic acid chelants are disclosed which have been found to be applicable in photographic processes. The aminosuccinic acids can be used in a method of bleaching or bleach-fixing a silver halide photographic material comprising contacting the photographic material with a bleaching solution containing at least one metal complex of a polyamino disuccinic acid and one or more metal complexes of a polyamino monosuccinic acid or a monoamino monosuccinic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.