Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6387345 | Process for working up reaction gases during the oxidation HCI to chlorine | Fritz Gestermann, Jürgen Schneider, Hans-Ulrich Dummersdorf, Helmut Harle, Helmut Waldmann | 2002-05-14 |
| 5820827 | Method and device for delivering hot, aggressive media | Hans-Ulrich Dummersdorf, Helmut Waldmann, Helmut Harle, Fritz Gestermann | 1998-10-13 |
| 5660810 | Method and device for delivering hot, aggressive media | Hans-Ulrich Dummersdorf, Helmut Waldmann, Helmut Harle, Fritz Gestermann | 1997-08-26 |
| 5612383 | Weakly basic anion exchangers, processes for their preparation by aminolysis and their use for removing sulphate ions from aqueous liquids | Harold Heller, Reinhold Klipper, Alfred Mitschker, Heiko Hoffmann | 1997-03-18 |
| 5569024 | Pump for delivering hot, corrosive media | Hans-Ulrich Dummersdorf, Helmut Waldman, Helmut Harle, Fritz Gestermann | 1996-10-29 |
| 5441646 | Process of removing sulfate ions from water with a poly(meth)acrylamide exchange resin | Harold Heller, Reinhold Klipper, Alfred Mitschker, Heiko Hoffmann | 1995-08-15 |
| 4725341 | Process for performing HCl-membrane electrolysis | — | 1988-02-16 |
| 4556463 | Process for removing sulphate from electrolysts brine | Sandor Vajna | 1985-12-03 |
| 4236983 | Process and apparatus for electrolysis of hydrochloric acid | Herbert Wiechers | 1980-12-02 |