Photographic elements containing sulfite releasable release compounds
US5283162A · kind A · utility
5Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 29, 1992 |
| Grant date | Feb 1, 1994 |
| Priority date | — |
| Expiry date | May 29, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
There are described photographic elements containing novel release compounds which release a blocked photographically useful group, such as a blocked development inhibitor. The blocking group is removed during processing as a result of reaction with sulfite ion contained in one of the processing baths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.