Patents by Inventor John L. Ezzell

John L. Ezzell 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).

  • Accelerated solvent extraction method
    Patent number: 5843311
    Abstract: Methods for the solvent extraction of organic analytes from a sample are provided. An organic solvent system is used to extract analytes under elevated temperatures and pressures above 100 psi but below supercritical conditions in short times and with low amounts of solvent. The extracted organic analytes are then removed by flowing a purge fluid through the extraction cell, the cell being maintained at a constant volume throughout the extraction and purging, afterwards the analytes being analyzed.
    Type: Grant
    Filed: June 14, 1994
    Date of Patent: December 1, 1998
    Assignee: Dionex Corporation
    Inventors: Bruce E. Richter, Christopher A. Pohl, Nathan L. Porter, Brian A. Jones, John L. Ezzell, Nebojsha Avdalovic
  • Automated accelerated solvent extraction apparatus and method
    Patent number: 5785856
    Abstract: An apparatus for automated extraction of an analyte from a sample positioned in a sample containment cell having a fluid passageway structure for communication of an extraction fluid to and from the cavity of the cell. The apparatus includes a loading tray, an oven assembly mounted proximate the loading tray, a fluid communication assembly mounted proximate the tray, a cell manipulation assembly and a controller. The cell manipulation assembly brings an inlet conduit and an outlet conduit of the fluid communication assembly into sealed relationship with the sample containment cell and uses the conduits to pick up and move the cell to and from the cell tray and oven assembly.
    Type: Grant
    Filed: March 18, 1997
    Date of Patent: July 28, 1998
    Assignee: Dionex Corporation
    Inventors: Gary L. Gleave, Norman J. Rothe, David W. Kemp, Bruce E. Richter, John L. Ezzell
  • Automated analyte supercritical fluid extraction apparatus
    Patent number: 5660727
    Abstract: An apparatus for automated extraction of an analyte from a sample positioned in a sample containment cell having a fluid passageway structure for communication of an extraction fluid to and from the cavity of the cell. The apparatus includes a loading tray, an oven assembly mounted proximate the loading tray, a fluid communication assembly mounted proximate the tray, a cell manipulation assembly and a controller. The cell manipulation assembly brings an inlet conduit and an outlet conduit of the fluid communication assembly into sealed relationship with the sample containment cell and uses the conduits to pick up and move the cell to and from the cell tray and oven assembly.
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: August 26, 1997
    Assignee: Dionex Corporation
    Inventors: Gary L. Gleave, Norman J. Rothe, David W. Kemp, Bruce E. Richter, John L. Ezzell