Granted Patent
Utility
US 4,289,942 · App. 05/820,176
Gas-blast circuit-interrupter with multiple insulating arc-shield construction
Inventor:
Stanislaw A. Milianowicz
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Jul 29, 1977
Inventor
Stanislaw A. Milianowicz
Assignee (at issue)
Westinghouse Electric Company LLC
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.