Black and white photographic element
US5928849A · kind A · utility
1Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1996 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Jul 31, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C2001/7448
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A black and white photographic element contains a filter dye of Formula (I): ##STR1## wherein each R.sup.1 is independently substituted or unsubstituted alkyl, substituted or unsubstituted alkoxy, cyano, hydroxy, carboxy, substituted or unsubstituted amido, or substituted or unsubstituted sulfonamido; n is 1-4; R.sup.2 is H, substituted or unsubstituted alkyl or amido; each of R.sup.3 and R.sup.4 is independently hydrogen or substituted or unsubstituted alkyl; and M is a cation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.