Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7597739 | Method for reducing a particulate material containing a metal, especially iron ore | Leopold Werner Kepplinger, Johannes Schenk, Siegfried Zeller, Konstantin Milionis, Hanspeter Ofner | 2009-10-06 |
| 6569377 | Plant for the direct reduction of particulate iron-oxide-containing material | Siegfried Zeller, Konstantin Milionis, Leopold Werner Kepplinger, Johann Zirngast, Johannes Schenk +1 more | 2003-05-27 |
| 6336954 | Process and plant for the direct reduction of particulate iron-oxide-containing material | Siegfried Zeller, Konstantin Milionis, Leopold Werner Kepplinger, Johann Zirngast, Johannes Schenk +1 more | 2002-01-08 |
| 6143053 | Process for producing sponge iron by direct reduction of iron-oxide-containing material | Siegfried Zeller, Felix Wallner, Roy Hubert Whipp, Jr. | 2000-11-07 |