Granted Patent
Utility
US 4,942,986 · App. 07/218,823
Pressurized tundish for controlling a continuous flow of molten metal
Inventors:
Thomas W. Lewis, Paul E. Hamill, Jr., Mustafa R. Ozgu, Ralph C. Padfield, Donovan N. Rego, Guido P. Brita
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Jul 13, 1988
Inventors
Thomas W. Lewis
Paul E. Hamill, Jr.
Mustafa R. Ozgu
Ralph C. Padfield
Donovan N. Rego
Guido P. Brita
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.