Patents by Inventor Phillip A. Freedman

Phillip A. Freedman 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).

  • Automatic mass spectrometer inlet system
    Patent number: 4495414
    Abstract: There is provided a mass spectrometer having a gas inlet system for introducing a sample into the ion source of the spectrometer which inlet system includes a cold trap for condensing a sample. The inlet system is provided with means for detecting the pressure therein and means for automatically controlling the operation of the cold trap in dependence on the detected pressure whereby the sample is automatically condensed in the cold trap when it is present in a small quantity. Around the cold trap is conveniently a coolant passage through which coolant from a coolant reservoir is drawn.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: January 22, 1985
    Assignee: V.G. Isogas Limited
    Inventors: Andrew Barrie, Phillip A. Freedman