Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5646038 | Process for bleaching surfactant solutions | Stefan Schmidt | 1997-07-08 |
| 5633358 | Process for bleaching aqueous surfactant solutions | Stefan Schmidt, Gerda Grund, Uwe Tanger | 1997-05-27 |