Granted Patent
Utility
US 5,115,447 · App. 07/639,547
Arc furnace electrode control
Inventor:
Ben B. Bowman
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Jan 10, 1991
Inventor
Ben B. Bowman
Assignee (at issue)
UCAR Carbon Technology Corporation
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.