Granted Patent
Utility
US 4,426,566 · App. 06/269,183
Apparatus for collecting process generated fume and/or slag
Inventors:
William J. Coughlin, Perry J. Rieppel, Stephen A. Hoffman
Patented Case
View Patent ↗
Granted: Jan 17, 1984
Filed: Jun 1, 1981
Inventors
William J. Coughlin
Perry J. Rieppel
Stephen A. Hoffman
Assignee (at issue)
Arcair Company
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.