Granted Patent
Utility
US 5,838,003 · App. 08/723,201
Ionization chamber and mass spectrometry system containing an asymmetric electrode
Inventors:
James L. Bertsch, Steven M. Fischer, Kent D. Henry, Eugene M. Wong
Patented Case
View Patent ↗
Granted: Nov 17, 1998
Filed: Sep 27, 1996
Inventors
James L. Bertsch
Steven M. Fischer
Kent D. Henry
Eugene M. Wong
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.