Patents by Inventor Iwan W. Griffiths

Iwan W. Griffiths 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).

  • Apparatus and method for the control and/or analysis of charged particles
    Patent number: 5120957
    Abstract: A method of analysis of a gaseous sample comprises the steps of introducing into a quistor a sample of ions characteristic of the gaseous sample, applying a potential to the electrodes of said quistor so that only one ionic species is stable in a trap of said quistor at any given instant, incrementing the potential applied to the electrodes of said quistor so that said ionic species becomes unstable and is ejected from said trap and determining the mass/charge ratio from the measurements of the parameters of said ion trap at the point of instability.
    Type: Grant
    Filed: September 25, 1991
    Date of Patent: June 9, 1992
    Assignee: National Research Development Corporation
    Inventor: Iwan W. Griffiths