Granted Patent
Utility
US 5,413,168 · App. 08/105,571
Cleaning method for heat exchangers
Inventor:
Allen J. Baum
Patented Case
View Patent ↗
Granted: May 9, 1995
Filed: Aug 13, 1993
Inventor
Allen J. Baum
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.