| |
 |
Azo dyes, azo dye-releasing compounds and photographic products and processes employing them |
| T994003 |
Azo dyes, azo dye-releasing compounds and photographic products and processes employing them
|
|
| Patent Drawings: | |
| Inventor: |
Kilminster |
| Date Issued: |
May 6, 1980 |
| Application: |
06/077,876 |
| Filed: |
September 21, 1979 |
| Inventors: |
Kilminster; Kenneth N. (London, GB2)
|
| Assignee: |
|
| Primary Examiner: |
|
| Assistant Examiner: |
|
| Attorney Or Agent: |
|
| U.S. Class: |
430/242; 430/390; 430/562; 534/843; 534/863 |
| Field Of Search: |
|
| International Class: |
|
| U.S Patent Documents: |
|
| Foreign Patent Documents: |
|
| Other References: |
|
|
| Abstract: |
Photographic elements, diffusion transfer assemblages and processes are described which employ a novel nondiffusible compound having a novel releasable azo dye. The dyes are azophenols, or precursors of azophenols, and have an electron withdrawing group in one of the positions ortho to the phenolic hydroxy group and a carbamoyl electron withdrawing group in the other position ortho to the phenolic hydroxy group. |
| Claim: |
|
| Description: |
|
|
|
|
