Granted Patent
Utility
US 5,223,711 · App. 07/852,159
Plasma sources mass spectrometry
Inventors:
Neil E. Sanderson, Christopher T. Tye
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Mar 31, 1992
Inventors
Neil E. Sanderson
Christopher T. Tye
Assignee (at issue)
Fisons plc
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.