Granted Patent
Utility
US 4,260,886 · App. 06/073,199
Measurement of a gas constituent by a mass spectrometer
Inventors:
Carlo Grilletto, Frank C. Vowinkel
Patented Case
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Granted: Apr 7, 1981
Filed: Sep 7, 1979
Inventors
Carlo Grilletto
Frank C. Vowinkel
Assignee (at issue)
RCA 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.