Granted Patent
Utility
US 4,291,208 · App. 05/963,633
Gas-insulated circuit-interrupter having improved insulating nozzle
Inventors:
Charles F. Cromer, Kue H. Yoon, Robert L. Hess, Thomas E. Kelsey, Michael G. Caithness
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Nov 24, 1978
Inventors
Charles F. Cromer
Kue H. Yoon
Robert L. Hess
Thomas E. Kelsey
Michael G. Caithness
Assignees (at issue)
Westinghouse Electric Company LLC
Northern Engineering Industries plc
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.