Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5021330 | Color photographic recording material containing a coupler releasing a photographically active compound | Peter Bergthaller, Thomas Krüger, Dirk Hubner | 1991-06-04 |
| 4870000 | Color photograhic recording material containing a coupler which releases a photographically active compound | Peter Bergthaller, Dirk Hubner | 1989-09-26 |
| 4767698 | Photographic material containing a pyridine azo or pyridazine azo cyan dye releasing compound | Peter Bergthaller, Paul Marx | 1988-08-30 |
| 4579805 | Color photographic recording material containing a thiophene azo dye releaser for cyan dyes | Peter Bergthaller, Hauke Furstenwerth, Paul Marx, Holger Heidenreich | 1986-04-01 |
| 4559296 | Photographic recording material containing new azo dyes | Peter Bergthaller, Lothar Rosenhahn, Karl J. Herd, Hauke Fuerstenwerth | 1985-12-17 |
| 4524124 | Color photographic recording material containing a thiazole azo dye releaser for cyan dyes | Peter Bergthaller, Paul Marx, Rainer Hamprecht | 1985-06-18 |
| 4521506 | Monoazo pyridinol dyes chelated or capable of being chelated with metal ions and their use for image production | Peter Bergthaller, Gerhard Wolfrum, Jurgen Strauss | 1985-06-04 |
| 4393132 | Photographic recording material with arylazocyanoacetic ester dye releasers | Gunther Schenk, Peter Bergthaller, Gerhard Wolfrum | 1983-07-12 |
| 4195992 | Photographic dye diffusion transfer process | Paul Marx, Walter Puschel | 1980-04-01 |