Patents by Inventor Matthew F. Appel

Matthew F. Appel 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 using a volume conductive electrode with ion optical elements for a time-of-flight mass spectrometer
    Patent number: 6924480
    Abstract: A technique employing volume conductive electrodes for the generation of linear or non-linear electric fields is provided for devices used in charged ion optics. A hollow cylinder of a conductive polymer, which is loaded with conductive carbon particles or inherently conductive, and which is used to improve the performance of a dual stage gridless reflectron. Instrumental resolution measurements comparing a conventional discrete ring reflectron with a hybrid polymeric/discrete ring validate the design.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: August 2, 2005
    Assignee: The Regents of the University of California
    Inventors: Wytze E. Van der Veer, Matthew F. Appel, Thorsten Benter
  • Apparatus and method for using a volume conductive electrode with ion optical elements for a time-of-flight mass spectrometer
    Publication number: 20030230726
    Abstract: A technique employing volume conductive electrodes for the generation of linear or non-linear electric fields is provided for devices used in charged ion optics. A hollow cylinder of a conductive polymer, which is loaded with conductive carbon particles or inherently conductive, and which is used to improve the performance of a dual stage gridless reflectron. Instrumental resolution measurements comparing a conventional discrete ring reflectron with a hybrid polymeric/discrete ring validate the design.
    Type: Application
    Filed: February 13, 2003
    Publication date: December 18, 2003
    Inventors: Wytze E. Van der Veer, Matthew F. Appel, Thorsten Benter