Granted Patent
Utility
US 6,549,557 · App. 09/860,887
AC arc furnace with auxiliary electromagnetic coil system for control of arc deflection
Inventor:
Brian Bowman
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: May 18, 2001
Inventor
Brian Bowman
Assignee (at issue)
UCAR Carbon Company 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.