Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5256525 | Blocked incorporated developers in a photographic element | David T. Southby, John Texter, John L. Pawlak | 1993-10-26 |
| 5246820 | Carbamic acid solubilized smearing couplers | James J. Seifert, Stephen P. Singer | 1993-09-21 |
| 5240821 | Solid particle dispersion developer precursors for photographic elements | John Texter, William B. Travis | 1993-08-31 |
| 5210007 | Image intensification chemistry with blocked incorporated developers | John Texter, David T. Southby, Roland G. Willis | 1993-05-11 |
| 5196519 | Reducible compounds which provide aniline dyes, and analytical compositions, elements and methods using same | — | 1993-03-23 |
| 5108902 | Reducible compounds which provide aniline dyes for analytical compositions and methods of using same | — | 1992-04-28 |
| 5108903 | Reducible compounds which provide leuco dyes for analytical compositions, elements and methods of using same | — | 1992-04-28 |
| 5019492 | Photographic element and process comprising a blocked photographically useful compound | John M. Buchanan, Ewell Cook, Gary S. Proehl, Stephen P. Singer, William N. Washburn | 1991-05-28 |
| 4840884 | Photographic element and process comprising a dye releasing group | Stephen P. Singer | 1989-06-20 |
| 4358525 | Blocked photographically useful compounds and photographic compositions, elements and processes employing them | William C. Archie, Jr. | 1982-11-09 |
| 4310612 | Blocked photographically useful compounds in photographic compositions, elements and processes employing them | William C. Archie, Jr. | 1982-01-12 |
| T101004 | Blocked pyrazolone magenta dye-forming couplers | Thomas E. Gompf, Howell A. Hammond | 1981-09-01 |
| 4283472 | Silver halide elements containing blocked pyrazolone magenta dye-forming couplers | Thomas E. Gompf, Howell A. Hammond | 1981-08-11 |