Granted Patent
Utility
US 4,795,066 · App. 06/422,022
Ladle nozzle insert
Inventor:
Richard A. Worrell
Patented Case
View Patent ↗
Granted: Jan 3, 1989
Filed: Sep 23, 1982
Inventor
Richard A. Worrell
Assignee (at issue)
Kaiser Steel 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.