Granted Patent
Utility
US 4,726,570 · App. 07/001,000
Apparatus and method for casting refractory linings in ladles
Inventors:
Robert H. Phillips, Robert D. Eckert, Alan L. Fisch, Glen H. Mead, III
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: Jan 7, 1987
Inventors
Robert H. Phillips
Robert D. Eckert
Alan L. Fisch
Glen H. Mead, III
Assignee (at issue)
NORTH AMERICAN REFRACTORIES 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.