Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5631357 | Nonionic emulsifiers | Manfred Weuthen, Petra Riegels | 1997-05-20 |
| 5612467 | Process for the production of light-colored alkyl oligoglycoside pastes | Manfred Weuthen, Burkhard Beckedahl | 1997-03-18 |