Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5330886 | Color photographic recording material | Gunter Helling | 1994-07-19 |
| 5241058 | Azo dye salts useful as masking couplers and preparation thereof | Hans Langen, Ulrich Klein | 1993-08-31 |
| 5075207 | Color photographic recording material containing new colored cyan couplers | Hans Langen, Jurgen Plamper | 1991-12-24 |
| 5002864 | Color photographic recording material containing 2-equivalent magenta couplers | Werner Liebe | 1991-03-26 |
| 4977072 | Color photographic recording material containing color couplers | Reinhart Matejec | 1990-12-11 |
| 4952487 | Color photographic recording material | Johannes Sobel, Klaus Wagner, Gunter Junkers, Friedhelm Sommer | 1990-08-28 |
| 4942116 | Color photographic recording material containing 2-equivalent magenta couplers | — | 1990-07-17 |
| 4868099 | Color photographic recording material with thiosulphonic acid ester | — | 1989-09-19 |
| 4855222 | Color photographic recording material | Erich Wolff, Heinz Wiesen, Werner Liebe | 1989-08-08 |
| 4855441 | Process for the preparation of thioether compounds | Erich Illner | 1989-08-08 |
| 4855216 | No-rinse photographic processing method and the stabilizing bath used for this method | Heinz Meckl, Erika Spriewald | 1989-08-08 |
| 4840880 | Color photographic recording material containing a yellow DIR coupler | Hans Ohlschlager, Friedrich-Wilhelm Kunitz, Heinrich Odenwalder, Dirk Hubner | 1989-06-20 |
| 4788133 | Color photographic recording material | Wolfgang Sauerteig, Sieghart Klotzer, Jens-Peter Grimm | 1988-11-29 |
| 4745052 | Color photographic recording material containing 2-equivalent magenta couplers | — | 1988-05-17 |
| 4738919 | Photosensitive photographic silver halide recording material | Gerd Krauss, Erich Wolff, Hans Langen, Werner Krafft | 1988-04-19 |
| 4710454 | Photographic recording material and a process for the production of photographic images | Hans Langen, Heinz-Dieter Schutz, Ubbo Wernicke, Wolfgang Himmelmann | 1987-12-01 |
| 4656125 | Photographic recording material | Werner Liebe | 1987-04-07 |
| 4581324 | Color photographic recording material for the production of color images viewed by reflected light | Erich Wolff, Friedrich-Wilhelm Kunitz | 1986-04-08 |
| 4529691 | Color photographic recording material containing color couplers | Erich Wolff, Friedhelm Sommer, Herbert Stark, Dieter Stieler, Egon Meier | 1985-07-16 |
| 4427763 | Photographic recording material with a precursor compound for a yellow mask | Joachim W. Lohmann, Wolfgang Sauerteig | 1984-01-24 |
| 4388403 | Process for the preparation of dispersions of hydrophobic substances in water | Gunter Helling, Helmut Reiff, Wolfgang Himmelmann | 1983-06-14 |
| 4381339 | Photographic recording material and non-diffusing compounds to be used in the material which contains a photographically active group which can be split off | Erich Wolff | 1983-04-26 |
| 4230851 | Process for the production of 2-equivalent yellow couplers | Quirin Scheben | 1980-10-28 |