Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5496403 | Process for preparing inorganic pigments of particular particle size | Harald Gaedcke, Guenter Etzrodt | 1996-03-05 |
| 5273577 | Bismuth phosphovanadate pigments | Helmut Knittel, Hans Ulrich Reisacher, Norbert Mronga, Harald Ochmann, Henning Wienand | 1993-12-28 |
| 4999134 | Zinc salts, lead salts and/or calcium salts of carboxylic acids and their use as corrosion inhibitors | Gerhard Haegele | 1991-03-12 |
| 4981489 | Disazo compounds and formulations containing same | Wolfgang Ruff, Gerhard Berger, Hans W. Sonneborn | 1991-01-01 |
| 4894094 | Disazo compounds and formulations containing same | Wolfgang Ruff, Gerhard Berger, Hans W. Sonneborn | 1990-01-16 |
| 4844741 | Thermostable rutile mixed phase pigments | Helmut Knittel, Roland Bauer, Guenter Etzrodt | 1989-07-04 |
| 4830775 | Zinc and/or lead salts of carboxylic acids and their use as corrosion inhibitors | Gerhard Haegele | 1989-05-16 |
| 4720304 | Pigment formulations | Wolfgang Ruff, Gerhard Berger, Hans W. Sonneborn | 1988-01-19 |
| 4609726 | Disazo dyes derived from 3,3'-dihalo-5,5'-dichlorobenzidine | Reinhard Kemper | 1986-09-02 |
| 4602960 | Modified diarylide pigments and their preparation | Wolfgang Ruff, Gerhard Berger, Hans W. Sonneborn, Reinhard Kemper | 1986-07-29 |
| 4530725 | Preparation of thermally stable lead chromate pigments | Werner Ostertag, Peter Dimroth, Henning Wienand, Helmut Knittel, Gunter Etzrodt | 1985-07-23 |
| 4222788 | Mixed pigment and process of preparing the same | Peter Dimroth, Wolfgang Ruff, Gerhard Berger, Peter REITER | 1980-09-16 |