Photographic material and process (B)
US4857440A · kind A · utility
18Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1988 |
| Grant date | Aug 15, 1989 |
| Priority date | — |
| Expiry date | Jun 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photographic compound (A) capable of releasing a photographically useful group by means of intramolecular nucleophilic displacement exhibits increased resistance to hydrolysis when the compound contains in a coupling position a coupling-off group represented by the formula: ##STR1## wherein Q, R.sub.q, R.sub.1, R.sub.2, R.sub.3, n and PUG are as defined in the application. Such a compound (A) is useful in a photographic silver halide material and process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.