Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6160169 | Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid | Rudolf Bermes, Hellmut Kast, Peter Krotzsch | 2000-12-12 |
| 5892105 | Preparation of amine salts of 4-nitrotoluene-2-sulfonic acid | Rudolf Bermes, Hellmut Kast, Peter Krotzsch | 1999-04-06 |
| 5169538 | Removal of nobler metal ions than iron from process and waste waters | Wolfgag Habermann, Wolfgang Kochanek | 1992-12-08 |