Patents by Inventor Rexford T. Heller

Rexford T. Heller 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).

  • Method and apparatus for controlling the ion population in a mass spectrometer
    Patent number: 7312441
    Abstract: A method of controlling the population of ions in a mass spectrometer in which a first sample of ions is provided in the mass spectrometer, a measure of abundance of a species of interest in the first sample of ions is determined, the measure of abundance comprising an intensity value, and a second sample of ions is introduced into the mass spectrometer. The second sample of ions is introduced in an amount determined at least in part on the measure of abundance of the species of interest in the first sample of ions.
    Type: Grant
    Filed: March 9, 2005
    Date of Patent: December 25, 2007
    Assignee: Thermo Finnigan LLC
    Inventors: Adrian Land, Lee Earley, Mark Hardman, Rexford T. Heller, Michael W. Senko
  • Mass spectrometer with improved mass accuracy
    Publication number: 20040031918
    Abstract: Mass spectrometers, and methods and apparatus, including computer program products, for operating the same, implement techniques for measuring mass of one or more analyte ions with high mass accuracy. The techniques include a calibration procedure that includes multiple calibration steps to account for system non-linearities. Components of a control system can be disposed in a thermally-controlled environment on a printed circuit board.
    Type: Application
    Filed: June 2, 2003
    Publication date: February 19, 2004
    Inventors: Alan E. Schoen, Rexford T. Heller, Hans Schweingruber