Granted Patent
Utility
US 5,171,990 · App. 07/703,471
Electrospray ion source with reduced neutral noise and method
Inventors:
Ian C. Mylchreest, Mark E. Hail
Patented Case
View Patent ↗
Granted: Dec 15, 1992
Filed: May 17, 1991
Inventors
Ian C. Mylchreest
Mark E. Hail
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.