Photographic material and process (A)
US4847185A · kind A · utility
10Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1988 |
| Grant date | Jul 11, 1989 |
| Priority date | — |
| Expiry date | Jun 30, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/158
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Photographic compounds capable of releasing a photographically useful group (PUG) by means of an intramolecular nucleophilic displacement provide increased image acutance when a coupling-off group in the coupling position of the compound is a group of the formula: ##STR1## wherein PUG is a photographically useful group; Q is N or C--R where R is hydrogen or a substituent that does not adversely affect imaging; and Z represents atoms completing a non-aromatic, heterocyclic ring. The photographic compounds are useful in photographic materials and processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.