Granted Patent
Utility
US 6,375,346 · App. 09/499,487
Method for detecting the spalling of a layer of buildup of a refractory lining in a metallurgical furnace
Inventor:
Mark Edwin Lunsford
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Feb 7, 2000
Inventor
Mark Edwin Lunsford
Assignee (at issue)
USX 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.