Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5037731 | Organic compounds for use in a dye diffusion transfer process and photographic elements incorporating them | Hans Vetter, Luc Vanmaele, Armand M. Van den Bergh, Wilhelmus Janssens | 1991-08-06 |
| 4985395 | Dye-donor element for thermal dye sublimation transfer | Luc Vanmaele | 1991-01-15 |
| 4871654 | Photographic element incorporating redox compounds for use in a dye diffusion transfer process | Luc Vanmaele | 1989-10-03 |
| 4855223 | Organic compounds for use in a dye diffusion transfer process and photographic elements incorporating them | Luc Vanmaele, Janssens Wilhelmus | 1989-08-08 |
| 4777124 | Azo dye compounds for use in a dye diffusion transfer process and photographic elements incorporating them | Luc Vanmaele, Wilhelmus Janssens, Hans Vetter | 1988-10-11 |
| 4748108 | Yellow dye-releasing azo compounds for use in the production of diffusion transfer color images | Piet Kok | 1988-05-31 |
| 4663273 | Non-diffusing compounds capable of releasing a diffusible dye or dye precursor compound with multiple dye units | Armand M. Van den Bergh, Andre Verhecken | 1987-05-05 |
| 4605613 | Ballasted dye compounds with linkages containing three aromatic nuclei for use in a dye diffusion transfer process and element | Armand M. Van den Bergh, Wilhelmus Janssens, Hans Vetter | 1986-08-12 |
| 4537853 | Photographic silver halide material containing a ballasted electron-donor precursor compound | Andre Verhecken, Wilhelmus Janssens | 1985-08-27 |
| 4483915 | Azo dye releasing compounds with hydrolytic removable group for dye diffusion transfer process | Armand M. Van den Bergh, Wilhelmus Janssens | 1984-11-20 |
| 4477554 | Diffusion transfer material and process | Andre Verhecken | 1984-10-16 |
| 4458011 | Ballasted compounds and photographic elements containing such compounds | Jan J. Vandewalle, Marcel J. Monbaliu, Raphael K. Van Poucke | 1984-07-03 |
| 4450223 | Diffusion transfer material and process | Raphael K. Van Poucke, Andree Verhecken | 1984-05-22 |
| 4430421 | Method of dispersing photographic adjuvants in hydrophilic colloid compositions | Jan J. Vandewalle, Raphael K. Van Poucke, Andre K. Claes | 1984-02-07 |
| 4430422 | Method of dispersing photographic adjuvants in a hydrophilic colloid composition | Jan J. Vandewalle, Luc MARTENS, Raphael K. Van Poucke | 1984-02-07 |
| 4371604 | Photographic material suited for use in diffusion transfer photography | Wilhelmus Janssens, Wolfgang Lassig, Ernst Meier | 1983-02-01 |