Granted Patent
Utility
US 5,017,752 · App. 07/487,747
Plasma arc torch starting process having separated generated flows of non-oxidizing and oxidizing gas
Inventors:
Wayne Stanley Severance, Jr., Tommie Zack Turner
Patented Case
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Granted: May 21, 1991
Filed: Mar 2, 1990
Inventors
Wayne Stanley Severance, Jr.
Tommie Zack Turner
Assignee (at issue)
ESAB Welding Products, Inc.
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.