Issued Patents All Time
Showing 51–61 of 61 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4459130 | Solid preparation of water-soluble acid dye and polymer particles with quaternary ammonium or phosphonium groups | Hans hlschlager, Hans Langen | 1984-07-10 |
| 4426438 | Anionic copolymers containing polyvalent metal cations and their use in photographic materials | — | 1984-01-17 |
| 4388403 | Process for the preparation of dispersions of hydrophobic substances in water | Helmut Reiff, Wolfgang Himmelmann, Gunter Renner | 1983-06-14 |
| 4379829 | Photographic material containing a temporary barrier layer applied from an organic solution | Werner Krafft, Guunther Matschke, Immo Boie | 1983-04-12 |
| 4379838 | Photosensitive photographic recording material comprising a dyed layer | Hans hlschlager, Wolfgang Himmelmann, Manfred Beck | 1983-04-12 |
| 4353972 | Light-sensitive photographic material comprising polymeric mordant layer | Kaspar Wingender, Wolfgang Himmelmann, Manfred Beck | 1982-10-12 |
| 4353980 | Process for the production of protective layers for photographic materials | Karl Fuhr | 1982-10-12 |
| 4294920 | Photographic silver halide emulsion | Wilhelm Saleck, Peter Bergthaller | 1981-10-13 |
| 4284708 | Photographic film unit for the production of colored transfer images | Werner Krafft, Kurt Charles Findeisen, Wolfgang Himmelmann | 1981-08-18 |
| 4284718 | Photographic silver halide materials containing sulfur containing polymers | Peter Bergthaller, Wilhelm Saleck | 1981-08-18 |
| 4186014 | Light sensitive photographic material containing a mordant layer | Peter Bergthaller, Wulf von Bonin, Paul Marx | 1980-01-29 |