Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5779995 | Sludge phase reactor and process for performing sludge phase reactions | Uwe J. Zarnack, Heiko Beckhaus | 1998-07-14 |
| 5728880 | Process for the separation of high-boiling materials from the reaction mixture generated during the production of diaminotoluene | Heiko Beckhaus, Uwe J. Zarnack, Gerd Greger | 1998-03-17 |
| 5001286 | Process for separating sulphuric acid and nitric acid from dinitrotoluene mixtures obtained during the nitration of toluene | Heiko Beckhaus | 1991-03-19 |
| 4857281 | Pauling boiler and process for the concentration of sulphuric acid | Heiko Beckhaus, Peter Klein | 1989-08-15 |
| 4792626 | Production of aromatic diamino compounds using a modified Raney catalyst | Dieter Becher, Udo Birkenstock, Eckart Waldau | 1988-12-20 |
| 4720326 | Process for working-up aqueous amine solutions | Heiko Beckhaus, Dieter Becher, Hermann Dallmeyer, Uwe J. Zarnack | 1988-01-19 |
| 4663490 | Process for the production of dinitrotoluene | Rudolf Gerken, Gunter Lailach, Dieter Becher | 1987-05-05 |