Granted Patent
Utility
US 4,957,009 · App. 07/467,299
Pushloop liquid sampling method
Inventors:
Andre J. Nohl, Landy B. White
Patented Case
View Patent ↗
Granted: Sep 18, 1990
Filed: Jan 11, 1990
Inventors
Andre J. Nohl
Landy B. White
Assignee (at issue)
Spectra-Physics, 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.