Granted Patent
Utility
US 6,336,954 · App. 09/505,559
Process and plant for the direct reduction of particulate iron-oxide-containing material
Inventors:
Siegfried Zeller, Konstantin Milionis, Johann Reidetschlager, Leopold Werner Kepplinger, Johann Zirngast, Johannes Schenk, Roy Hubert Whipp, Jr.
Patented Case
View Patent ↗
Granted: Jan 8, 2002
Filed: Feb 17, 2000
Inventors
Siegfried Zeller
Konstantin Milionis
Johann Reidetschlager
Leopold Werner Kepplinger
Johann Zirngast
Johannes Schenk
Roy Hubert Whipp, Jr.
Assignee (at issue)
Voest-Alpine Industrieanlagenbau GmbH & Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.