Granted Patent
Utility
US 4,855,595 · App. 06/881,871
Electric field control in ion mobility spectrometry
Inventor:
William C. Blanchard
Patented Case
View Patent ↗
Granted: Aug 8, 1989
Filed: Jul 3, 1986
Inventor
William C. Blanchard
Assignee (at issue)
AlliedSignal, Inc.
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.