Granted Patent
Utility
US 4,773,079 · App. 06/896,935
Process for melting down and degassing lumpy material
Inventors:
Gerhard Bruckmann, Johann Kemmer, Felix Muller, Detley Schlebusch, Ulrich Hensgen
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Aug 15, 1986
Inventors
Gerhard Bruckmann
Johann Kemmer
Felix Muller
Detley Schlebusch
Ulrich Hensgen
Assignee (at issue)
Leybold-Heraeus GmbH
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.