Granted Patent
Utility
US 5,114,472 · App. 07/627,000
Multistage rigid media filter for molten metal and method of filtering
Inventors:
C. Edward Eckert, Thomas R. Hornack, George E. Lyness, John A. Kaems, Clarence J. Cox, Ronald E. Miller, Diran Apelian, Rajakkannu Mutharasan
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Dec 13, 1990
Inventors
C. Edward Eckert
Thomas R. Hornack
George E. Lyness
John A. Kaems
Clarence J. Cox
Ronald E. Miller
Diran Apelian
Rajakkannu Mutharasan
Assignee (at issue)
Aluminum Company of America
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.