Granted Patent
Utility
US 5,820,772 · App. 08/786,562
Valveless diaphragm pump for dispensing molten metal
Inventors:
Otto W. Freitag, Randy Stevenson, Keith W. Meranda
Patented Case
View Patent ↗
Granted: Oct 13, 1998
Filed: Jan 21, 1997
Inventors
Otto W. Freitag
Randy Stevenson
Keith W. Meranda
Assignee (at issue)
Ford Motor 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.