Filter dyes for photographic elements
US4923788A · kind A · utility
22Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 9, 1989 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Feb 9, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/832
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Photographic elements comprising filter dyes of the formula: ##STR1## R, R', L, L', L", X, and n are as defined herein are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.