Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5753775 | Sulfonated and oxidized indene polymers | Eberhard Beckmann, Stefan Erren, Ulf Baus, Norbert Zimmermann, Erich Kromm +2 more | 1998-05-19 |
| 5186846 | Dye dispersants: aryl sulphonic acid-formaldehyde condensate or ligninsulfonate | Ralf Brueckmann, Johannes P. Dix, Manfred Herrmann, Waldemar Dlugosch, Erich Kromm +4 more | 1993-02-16 |