Granted Patent
Utility
US 4,493,970 · App. 06/458,600
Slag and fume collector for air carbon-arc cutting and gouging torches
Inventors:
Perry J. Rieppel, William J. Coughlin
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Jan 17, 1983
Inventors
Perry J. Rieppel
William J. Coughlin
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.