Granted Patent
Utility
US 4,570,910 · App. 06/663,736
Method of constructing a steelmaking ladle
Inventor:
Thomas Geisler
Patented Case
View Patent ↗
Granted: Feb 18, 1986
Filed: Nov 29, 1984
Inventor
Thomas Geisler
Assignee (at issue)
National Refractories & Minerals 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.