Granted Patent
Utility
US 4,951,928 · App. 07/337,920
Blowing lance arrangement
Inventors:
Manfred Eysn, Ernest Fuhrmann, Hans Grabner, Ernst Hollwarth, Hellmuth Smejkal
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Apr 14, 1989
Inventors
Manfred Eysn
Ernest Fuhrmann
Hans Grabner
Ernst Hollwarth
Hellmuth Smejkal
Assignee (at issue)
Voest-Alpine Industrieanlagenbau Gesellschaft m.b.H.
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.