Granted Patent
Utility
US 5,261,600 · App. 07/984,309
Vertical tube bundle cleaner
Inventor:
Robert R. Cradeur
Patented Case
View Patent ↗
Granted: Nov 16, 1993
Filed: Nov 30, 1992
Inventor
Robert R. Cradeur
Assignee (at issue)
Servi-Tech, Inc
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.