Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861703 | Cyclic dichalcogenide fog inhibiting agents for silver halide photography | Roger Lok, Wolfgang H. H. Gunther | 1989-08-29 |
| 4737439 | Photographic compositions and elements including internal latent image silver halide grains and nucleating agents therefor | Roy L. Orvis, Richard L. Parton, Karl E. Wiegers | 1988-04-12 |
| 4578348 | Hydrolyzed azolium speed enhancing/fog-inhibiting agents for silver halide photography | Fred M. Macon, John D. Mee | 1986-03-25 |
| T104903 | Photographic speed increasing and latent image stabilizing compounds | Roger Lok, William H. Baum | 1984-12-04 |
| 4451557 | Photographic speed increasing and latent image stabilizing compounds, silver halide emulsions, and photographic elements | Roger Lok, William Baum | 1984-05-29 |
| T103803 | Photographic speed increasing and latent image stabilizing compounds, silver halide emulsions, and photographic elements | Roger Lok, William Baum | 1984-01-03 |
| 4378426 | Photographic speed increasing and latent image stabilizing compounds, silver halide emulsions, and photographic elements | Roger Lok, William Baum | 1983-03-29 |