Patents by Inventor Lee J. Piper

Lee J. Piper 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 employing ion shutters for ion separation
    Patent number: 10942148
    Abstract: The disclosure relates to methods and apparatus for ion separation, for example using time of flight and ion mobility spectrometry. Ion shutters for use in IMS cells and to methods of operating them are also disclosed. The shutter includes a first shutter electrode and a second shutter electrode. A barrier voltage between these two electrodes is controlled to open and close the shutter to allow ions of interest to pass through the shutter in a drift direction. The control involves varying both: (a) the voltage of the first shutter electrode; and (b) the voltage of the second shutter electrode.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: March 9, 2021
    Assignee: SMITHS DETECTION—WATFORD LIMITED
    Inventor: Lee J. Piper
  • APPARATUS AND METHOD EMPLOYING ION SHUTTERS FOR ION SEPARATION
    Publication number: 20200132626
    Abstract: The disclosure relates to methods and apparatus for ion separation, for example using time of flight and ion mobility spectrometry. Ion shutters for use in IMS cells and to methods of operating them are also disclosed. The shutter includes a first shutter electrode and a second shutter electrode. A barrier voltage between these two electrodes is controlled to open and close the shutter to allow ions of interest to pass through the shutter in a drift direction. The control involves varying both: (a) the voltage of the first shutter electrode; and (b) the voltage of the second shutter electrode.
    Type: Application
    Filed: October 1, 2019
    Publication date: April 30, 2020
    Inventor: Lee J. Piper