Granted Patent
Utility
US 5,083,470 · App. 07/590,439
Capacitive liquid level sensor
Inventors:
James E. Davis, Stephen J. Simko
Patented Case
View Patent ↗
Granted: Jan 28, 1992
Filed: Sep 28, 1990
Inventors
James E. Davis
Stephen J. Simko
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND 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.