Granted Patent
Utility
US 4,940,384 · App. 07/309,613
Molten metal pump with filter
Inventors:
Lutfi H. Amra, Thomas Byrne, Harvey G. Martin, George S. Mordue, David Neff
Patented Case
View Patent ↗
Granted: Jul 10, 1990
Filed: Feb 10, 1989
Inventors
Lutfi H. Amra
Thomas Byrne
Harvey G. Martin
George S. Mordue
David Neff
Assignee (at issue)
Carborundum 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.