Granted Patent
Utility
US 5,606,792 · App. 08/305,251
Hydraulic expander assembly and control system for sleeving heat exchanger tubes
Inventor:
Bruce William Schafer
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: Sep 13, 1994
Inventor
Bruce William Schafer
Assignee (at issue)
B&W Nuclear Technologies
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.