Photographic bleaching compositions
US4454224A · kind A · utility
16Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1982 |
| Grant date | Jun 12, 1984 |
| Priority date | — |
| Expiry date | Dec 22, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/144
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Fast acting and ecologically advantageous compositions for the bleaching of photographically developed silver are comprised of a peroxy compound, a buffering agent, and an aminopolyacetic or thiopolyacetic acid which contains at least three carboxyl groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.