Granted Patent
Utility
US 4,864,093 · App. 07/253,969
Exothermic cutting electrode
Inventors:
Harold R. Henderson, Robert L. Strohl
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Oct 5, 1988
Inventors
Harold R. Henderson
Robert L. Strohl
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.