Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6402910 | Electrolytic cell | Hermann Putter, Günther Huber, Luise Spiske, Hans Stark, Dieter Schlafer | 2002-06-11 |
| 6235183 | Electrolytic method for the production of sodium and aluminum chloride | Hermann Putter, Günther Huber, Luise Spiske, Hans Stark, Dieter Schlafer | 2001-05-22 |
| 4971781 | Working up sodium sulfate-containing residues | Hermann Meyer, Rainer Roemer | 1990-11-20 |
| 4769227 | Preparation of anhydrous aluminum chloride | Hermann Meyer, Wilhelm Goesele, Hans Stark | 1988-09-06 |
| 4475749 | Flange coupling | Max Appl, Erfried Voelkl, Hans Stark, Gerhard Peschau | 1984-10-09 |
| 4324570 | Apparatus for de-dusting gases | Gerhard Peschau, Guenter Schippmann, Max Appl, Erfried Voelkl, Hans Stark | 1982-04-13 |
| 4301126 | Process for destroying phosgene | Gerd Duembgen, Erfried Voelkl | 1981-11-17 |