Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7264670 | Coloured microstructured effect pigments | Kersten Dittmar, Johann Dietz, Ralf Tischer | 2007-09-04 |
| 6218070 | Process to make ultrahigh contrast images | — | 2001-04-17 |
| 6150083 | Photograhic silver halide material and process for preparing silver images | François Varescon | 2000-11-21 |
| 6033825 | Silver-halide recording material to produce negatives with reduced fog and ultrahardgradation | François Varescon | 2000-03-07 |
| 6030744 | Silver-halide recording material with improved storage stability to produce negatives with ultrahard-gradation contrast | François Varescon | 2000-02-29 |
| 5783357 | Tertiary amino contrast increasers for ultrahigh contrast silver halide recording material | — | 1998-07-21 |
| 5663034 | Silver halide recording material for making negative images having ultrahigh contrast | — | 1997-09-02 |
| 5637439 | Photographic silver halide photosensitive material and method for developing the same | Satoshi Kaneko, Kenji Hirata, Akira Tanaka | 1997-06-10 |
| 5416218 | Aryl hydrazides | Dominic M. Chan | 1995-05-16 |
| 5407792 | Photosensitive silver halide recording material with reduced pressure sensitivity | — | 1995-04-18 |
| 5190847 | Photographic silver halide materials containing aryl hydrazides | Dominic M. Chan | 1993-03-02 |
| 5130480 | Ammonium aryl hydrazide compounds | — | 1992-07-14 |
| 5013844 | Pyridinium aryl hydrazide compounds | — | 1991-05-07 |
| 4937160 | Photographic silver halide elements containing aryl hydrazides | — | 1990-06-26 |