Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700351 | Antifoams based on oil-in-water emulsions for the paper industry | Rudolf Schuhmacher, Knut Oppenlaender, Brigitte Wegner, Andreas Hohmann | 1997-12-23 |
| 5663435 | Reaction products of aminoalkylenecarboxylic acids and mineral oil middle distillates which contain them | Knut Oppenlander, Klaus Barthold, Bernd Wenderoth, Wolfgang Kasel | 1997-09-02 |