Issued Patents All Time
Showing 76–82 of 82 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5019492 | Photographic element and process comprising a blocked photographically useful compound | John M. Buchanan, Ewell Cook, Jared B. Mooberry, Gary S. Proehl, William N. Washburn | 1991-05-28 |
| 4923784 | Photographic elements containing a bleach accelerator precursor | John W. Harder | 1990-05-08 |
| 4912024 | Photographic material having releasable compound | Drake M. Michno, Richard P. Szajewski | 1990-03-27 |
| 4865956 | Photographic elements containing a bleach accelerator precursor | John W. Harder | 1989-09-12 |
| 4840884 | Photographic element and process comprising a dye releasing group | Jared B. Mooberry | 1989-06-20 |
| 4634654 | Photographic products employing nondiffusible 4-arylazo-1-hydroxy-2-carboxy ester substituted naphthoic image dye-providing compounds | — | 1987-01-06 |
| 4619884 | Photographic products employing nondiffusible N',N'-diaromatic carbocyclic--or diaromatic heterocyclic--sulfonohydrazide compounds capable of releasing photographically useful groups | — | 1986-10-28 |