Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7597739 | Method for reducing a particulate material containing a metal, especially iron ore | Leopold Werner Kepplinger, Johann Reidetschlager, Johannes Schenk, Siegfried Zeller, Hanspeter Ofner | 2009-10-06 |
| 6569377 | Plant for the direct reduction of particulate iron-oxide-containing material | Siegfried Zeller, Johann Reidetschlager, 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, Johann Reidetschlager, Leopold Werner Kepplinger, Johann Zirngast, Johannes Schenk +1 more | 2002-01-08 |
| 6183534 | Plant and process for the production of pig iron and/or sponge iron | Leopold Werner Kepplinger, Dieter Siuka, Horst Wiesinger | 2001-02-06 |
| 5997608 | Process for the production of molten pig iron or molten steel, pre-products and sponge iron and a plant for carrying out the process | Jorg Diehl, Gerald Rosenfellner, Leopold Werner Kepplinger, Dieter Siuka, Horst Wiesinger | 1999-12-07 |
| 5989308 | Plant and process for the production of pig iron and/or sponge iron | Leopold Werner Kepplinger, Dieter Siuka, Horst Wiesinger | 1999-11-23 |
| 5855643 | Direct reduction process for iron oxide-containing materials | Gerhard Cip, Sadat Morteza Guscheh, Roy Hubert Whipp, Jr. | 1999-01-05 |
| 5833734 | Process for the direct reduction of particulate iron-containing material and a plant for carrying out the process | Gerhard Cip, Gottfried Rossmann, Roy Hubert Whipp, Jr. | 1998-11-10 |
| 5554206 | Method of charging ore | Karl Czermak, Gero Tessmer, Roy Hubert Whipp, Jr. | 1996-09-10 |
| 5439504 | Direct-reduction process for directly reducing particulate iron-oxide-containing material | Karl Czermak, Johannes Schenk, Siegfried Zeller | 1995-08-08 |
| 4822411 | Integrated steel mill arrangement | Gerhard Standler, Siegfried Zeller, Rudolf Zeller | 1989-04-18 |
| 4729786 | Process for the direct reduction of iron-oxide-containing materials | Hermann Schneider, Hermann Pusch | 1988-03-08 |
| 4720299 | Method for the direct reduction of particulate iron-oxide-containing material | — | 1988-01-19 |
| 4699655 | Process and a plant for the direct reduction of iron oxide particles in a shaft furnace and for smelting the obtained iron sponge particles in a meltdown gasifier | — | 1987-10-13 |