Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363865 | Imido methyl blocked photographic dyes and dye releasing compounds | Thomas R. Welter | 1982-12-14 |
| 4358404 | Nondiffusible 6-arylazo-3-pyridinol | Derek D. Chapman | 1982-11-09 |
| 4350752 | Photographic elements and film units containing imidomethyl blocked photographic reagents | Thomas R. Welter | 1982-09-21 |
| 4346155 | Photographic products and processes employing novel nondiffusible 6-arylazo-3-pyridinol magenta dye-releasing compounds and percursors thereof | Derek D. Chapman | 1982-08-24 |