Photographic material and process
US5242783A · kind A · utility
8Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1992 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Jul 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A novel blocked photographically useful compound element and process are based on a new blocking group that comprises a beta-ketocarbonyl group that is part of a 5- to 7-member heterocyclic ring containing a hetero-atom not adjacent to the beta-ketocarbonyl group. Such a blocked photographically useful compound provides a photographic material and process enabling more rapid release of the photographically useful group upon processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.