Granted Patent
Utility
US 4,438,306 · App. 06/339,605
Circuit interrupter operating mechanism having a chemical operator with a stationary piston
Inventors:
Ronald W. Crookston, Ivan T. Burney
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Jan 15, 1982
Inventors
Ronald W. Crookston
Ivan T. Burney
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.