Granted Patent
Utility
US 4,273,076 · App. 05/974,178
Steam generator sludge lancing apparatus
Inventors:
Edward J. Lahoda, Thomas H. Dent
Patented Case
View Patent ↗
Granted: Jun 16, 1981
Filed: Dec 28, 1978
Inventors
Edward J. Lahoda
Thomas H. Dent
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.