Granted Patent
Utility
US 5,750,988 · App. 08/794,248
Orthogonal ion sampling for APCI mass spectrometry
Inventors:
James Apffel, Mark H. Werlich, James L. Bertsch, Paul C. Goodley
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Feb 3, 1997
Inventors
James Apffel
Mark H. Werlich
James L. Bertsch
Paul C. Goodley
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.