Patents by Inventor Guy P. Arsenault

Guy P. Arsenault has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Ionization method for mass spectrometry
    Patent number: 4005291
    Abstract: A gas, vapor or aerosol substance is ionized for mass spectral analysis by passing the substance through a chemical ionization zone in the presence of (a) charge exchange reactant gas or hydrogen and (b) a chemical ionization reactants' gas. The ionized substance can be passed directly to a mass spectrometer or through an electron impact ionization zone and then to the mass spectrometer.
    Type: Grant
    Filed: September 27, 1973
    Date of Patent: January 25, 1977
    Assignee: Massachusetts Institute of Technology
    Inventor: Guy P. Arsenault
  • IONIZATION APPARATUS AND METHOD FOR MASS SPECTROMETRY
    Patent number: 3984692
    Abstract: Ionizing gaseous substances (e.g., for mass spectral analysis) by passing the neutral gaseous substances sequentially through a chemical ionization (CI) zone and an electron impact ionization (EI) zone and impelling gaseous ions formed in one or both of the zones to a mass spectrometer. CI, EI, simultaneous EI--EI, and closely alternating CI and EI spectra are obtainable.
    Type: Grant
    Filed: January 4, 1972
    Date of Patent: October 5, 1976
    Inventor: Guy P. Arsenault