Granted Patent
Utility
US 6,570,906 · App. 09/946,885
ARC furnace with DC arc and AC joule heating
Inventor:
Charles H. Titus
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Sep 5, 2001
Inventor
Charles H. Titus
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.