Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7351474 | Pigment preparations | Achim Grefenstein, Wieland Jenet, Robert Bayer, Reinhold Rieger | 2008-04-01 |
| 5536309 | Bismuth vanadate pigments | Helmut Knittel, Hansulrich Reisacher | 1996-07-16 |
| 5496403 | Process for preparing inorganic pigments of particular particle size | Harald Gaedcke, Egon Liedek | 1996-03-05 |
| 4844741 | Thermostable rutile mixed phase pigments | Helmut Knittel, Roland Bauer, Egon Liedek | 1989-07-04 |