Granted Patent
Utility
US 6,377,605 · App. 09/796,545
Electrode seal for arc furnace
Inventor:
Felim McCaffrey
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Mar 2, 2001
Inventor
Felim McCaffrey
Assignee (at issue)
Hatch Ltd.
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.