Granted Patent
Utility
US 4,499,752 · App. 06/506,737
Counterflow leak detector with cold trap
Inventors:
Paul R. Fruzzetti, Philip J. Leavitt, Frank J. Nuzzi
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Jun 22, 1983
Inventors
Paul R. Fruzzetti
Philip J. Leavitt
Frank J. Nuzzi
Assignee (at issue)
Varian, 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.