Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388137 | Method of purifying triethanolamine | Karl-Heinz Ross | 2002-05-14 |
| 6323371 | Process for the preparation of alkanolamines having improved color quality | Karl-Heinz Ross, Johann-Peter Melder, Gerhard Schulz, Frank Gutschoven, Philip Buskens | 2001-11-27 |
| 6291715 | Process for the preparation of alkanolamines having improved color quality | Karl-Heinz Ross, Boris Breitscheidel, Heike Maier, Gerhard Schulz, Sylvia Huber | 2001-09-18 |
| 5663444 | Preparation of a pure dialkylaminoethanol stable against discoloration | Johann-Peter Melder, Tom Witzel, Karl-Heinz Ross, Gunter Boettger | 1997-09-02 |