Photographic element containing a macrocyclic ether compound
US4782013A · kind A · utility
7Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1987 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Jul 23, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D343/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to a photographic element containing a radiation-sensitive silver halide emulsion layer and a macrocyclic thia or selena ether compound which also comprises oxygen atoms. These macrocyclic compounds are improved silver halide ripening agents.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.