Patents by Inventor Jonathan W. Amy

Jonathan W. Amy 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).

  • Quadrupole ion trap with electronic shims
    Patent number: 6608303
    Abstract: There is provided a quadrupole ion trap mass spectrometer of the type having a plurality of ring electrodes and defining a trapping volume. The quadrupole potential faults arising from apertures in the electrodes are corrected by an apertured shim electrode placed within and spaced from the walls of the electrode apertures.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: August 19, 2003
    Assignee: Thermo Finnigan LLC
    Inventors: Jonathan W. Amy, Michael Senko, Dennis M. Taylor
  • Quadrupole ion trap with electronic shims
    Publication number: 20020185596
    Abstract: There is provided a quadrupole ion trap mass spectrometer of the type having a plurality of ring electrodes and defining a trapping volume. The quadrupole potential faults arising from apertures in the electrodes are corrected by an apertured shim electrode placed within and spaced from the walls of the electrode apertures.
    Type: Application
    Filed: June 6, 2001
    Publication date: December 12, 2002
    Applicant: Thermo Finnigan LLC
    Inventors: Jonathan W. Amy, Michael Senko, Dennis M. Taylor
  • Non-destructive ion trap mass spectrometer and method
    Patent number: 5625186
    Abstract: The invention relates to an ion trap mass spectrometer of the type having an ion trapping volume defined by spaced end caps and a ring electrode. The ion trap includes a small sensing electrode which senses characteristic motion of ions trapped in said trapping volume and provides an image current. Ions are excited into characteristic motion by application of an excitation pulse to the trapped ions. The invention also relates to a method of operating such an ion trap.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: April 29, 1997
    Assignee: Purdue Research Foundation
    Inventors: Vladimir E. Frankevich, Manish H. Soni, Mario Nappi, Robert E. Santini, Jonathan W. Amy, Robert G. Cooks
  • Metal surfaces for sample analyzing and ionizing apparatus
    Patent number: 5055678
    Abstract: A chromium or oxidized chromium surface for use in sample analyzing and ionizing apparatus, such as an ion trap or ionization chamber, which does not degrade or decompose a sample in contact with the surface.
    Type: Grant
    Filed: March 2, 1990
    Date of Patent: October 8, 1991
    Assignee: Finnigan Corporation
    Inventors: Dennis M. Taylor, Jonathan W. Amy, George C. Stafford, Jr.
  • Electron multiplier with replaceable rear section
    Patent number: 5030878
    Abstract: A segmented electron multiplier is disclosed with front and rear sections. The sections are specially designed so that the length of the rear section compared to the length of the front section is no less than 4:1. This permits multiple replacements of the rear section, after the multiplier wears out, without any unsatisfactory drop in the overall electrical gain produced by the repaired device. In the preferred embodiment, the front portion is a funnel having a tubular stem, and the rear portion is a straight tube with a cylindrical helical inner channel. The length-to-length split is 5:1, which theoretically permits up to six or seven replacements of the rear section before unsatisfactory gain occurs.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: July 9, 1991
    Assignee: Detector Technology, Inc.
    Inventors: Raymond L. Roy, Peter W. Graves, Thomas J. Loretz, Jonathan W. Amy, George C. Stafford, Jr.