Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6013420 | Chromogenic process for the production of color images using a color photographic recording material, which contains embedded color developer compounds that can be activated by heat treatment | Kaspar Wingender | 2000-01-11 |
| 4894312 | Dye diffusion process with base precursor salts of strong organic bases and weak organic acids | Holger Ohst, Carlhans Suling, Kaspar Wingender, Manfred Peters, Immo Boie | 1990-01-16 |
| 4865940 | Photographic recording material | Karl-Wilhelm Schranz | 1989-09-12 |
| 4847179 | Photographic dye diffusion transfer process and color photographic recording material suitable for this process | Immo Boie, Manfred Peters, Wolfgang Himmelmann, Thomas Kaluschke, Kaspar Wingender +1 more | 1989-07-11 |
| 4840871 | Color photographic heat development process | Manfred Peters, Hans hlschlager, Thomas Kaluschke, Kaspar Wingender, Immo Boie | 1989-06-20 |
| 4816372 | Heat development process and color photographic recording material suitable for this process | Manfred Peters | 1989-03-28 |
| 4810628 | Color photographic recording material capable of being developed by heat treatment | Karl-Wilhelm Schranz | 1989-03-07 |
| 4770970 | Photographic heat development process and auxiliary sheet suitable therein | Karl-Wilhelm Schranz | 1988-09-13 |
| 4740446 | Heat development process and color photographic recording material suitable for this process | Karl-Wilhelm Schranz | 1988-04-26 |
| 4732839 | Alkali metal alginate surface layer for heat development process | Karl-Wilhelm Schranz | 1988-03-22 |
| 4689286 | Color photographic recording material developable by heat treatment | Karl-Wilhelm Schranz, Hans hlschlager | 1987-08-25 |
| 4524123 | Chelatable 4-thienyl imidazole azo dyes, their use in color photographic recording material | Peter Bergthaller, Holger Heidenreich, Gerhard Wolfrum | 1985-06-18 |
| 4461827 | Color photographic recording material containing a non-diffusible dye releaser from which a complexible azo dye is released during development | Peter Bergthaller, Gerhard Wolfrum | 1984-07-24 |
| 4418143 | Color photographic recording material | Peter Bergthaller, Gerhard Wolfrum, Hans-Volker Runzheimer, Holger Heidenreich | 1983-11-29 |
| 4396710 | Photographic recording material with metal complexable, heterocyclic azo dye | Peter Bergthaller, Gerhard Wolfrum, Hans-Volker Runzheimer | 1983-08-02 |
| 4393132 | Photographic recording material with arylazocyanoacetic ester dye releasers | Peter Bergthaller, Gerhard Wolfrum, Rudolf Stolzenburg | 1983-07-12 |