Granted Patent
Utility
US 4,581,533 · App. 06/610,502
Mass spectrometer and method
Inventors:
Duane P. Littlejohn, Sahba Ghaderi
Patented Case
View Patent ↗
Granted: Apr 8, 1986
Filed: May 15, 1984
Inventors
Duane P. Littlejohn
Sahba Ghaderi
Assignee (at issue)
Nicolet Instrument Corporation
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.