Granted Patent
Utility
US 5,543,625 · App. 08/246,792
Filament assembly for mass spectrometer ion sources
Inventors:
Bruce S. Johnson, Mukul Khosla, John R. Herron, John Brassil, Alan E. Schoen
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: May 20, 1994
Inventors
Bruce S. Johnson
Mukul Khosla
John R. Herron
John Brassil
Alan E. Schoen
Assignee (at issue)
Finnigan 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.