Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7677788 | Curved blade mixing device | Hans-Jurgen Weiss, Udo Zentner, Burghard Neumann | 2010-03-16 |
| 6652739 | Process for deasphalting residua by reactive recycle of high boiling material | Mitchell Jacobson, Willibald Serrand, Norman H. Sweed, Hans-Jurgen Weiss, Ingo Dreher +1 more | 2003-11-25 |
| 6469203 | Method for depolymerizing polymethylmethacrylate | Hans-Jurgen Weiss, Udo Zentner, Tobias Groschang, Udo Gropp, Werner Fuss +2 more | 2002-10-22 |
| 6413415 | Method for high-temperature short-time distillation of residual oils | Hans-Jurgen Weiss, Udo Zentner, Ingo Dreher, Willibald Serrano | 2002-07-02 |
| 5584970 | Process of producing wood charcoal in a moving bed | Hans J. Eichwald, Udo Zentner | 1996-12-17 |
| 4935099 | Process for making wood charcoal | Hans-Jurgen Weiss, Ingo Dreher, Johannes Arnhold | 1990-06-19 |
| 4659456 | Process of drying and heating oil-containing solids | Roland Rammler, Hans-Jurgen Weiss, Ingo Dreher, Karl-Heinz Bietz | 1987-04-21 |
| 4408548 | Pulverized coal combustion method and apparatus | Werner Bruckner, Jorn Jacobs, H. S. Greulich, A. Schlutter | 1983-10-11 |