Granted Patent
Utility
US 5,721,141 · App. 08/670,996
Tube washing system
Inventors:
Arthur L. Babson, Thomas Palmieri
Patented Case
View Patent ↗
Granted: Feb 24, 1998
Filed: Jun 28, 1996
Inventors
Arthur L. Babson
Thomas Palmieri
Assignee (at issue)
DPC Cirrus, 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.