Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663137 | Ultramild surfactant mixtures II | Brigitte Giesen, Karl Schmid, Walter Sterzel | 1997-09-02 |
| 5658875 | Ultramild surfactant mixtures | Brigitte Giesen, Karl Schmid, Walter Sterzel | 1997-08-19 |