Granted Patent
Utility
US 6,748,004 · App. 10/452,924
Methods and apparatus for improved energy efficient control of an electric arc furnace fume extraction system
Inventor:
Stewart C. Jepson
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Jun 3, 2003
Inventor
Stewart C. Jepson
Assignee (at issue)
Air Liquide America, L.P.
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.