Granted Patent
Utility
US 4,664,703 · App. 06/871,885
Method for suppressing fuming in molten steel
Inventor:
Ronald R. Landreth
Patented Case
View Patent ↗
Granted: May 12, 1987
Filed: Jun 9, 1986
Inventor
Ronald R. Landreth
Assignee (at issue)
Inland Steel Company
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.