Patents by Inventor Norman J. Rothe

Norman J. Rothe 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).

  • 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
  • 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
  • Patent number: 5647976
    Abstract: An extraction cell apparatus (10) for use in elevated pressure and temperature fluid extractions having a pressure resistant vessel (12) forming a cavity (11), and at least one shoulder portion (13) defining an opening (14) communicating with the cavity (11). An insert member (16) is provided engaging the vessel (12) proximate the shoulder portion (13), and a shoulder seal member (17) is positioned proximate the insert member (16). The seal member (17) is positioned for contact with the shoulder portion (13) upon mounting engagement of the insert member (16) with the seal member (17). An end cap (18) is formed for sliding receipt of the insert member (16) therein until an interior surface (19) of the end cap (18) contacts a backside of the seal member (17). An exterior force applied to the end cap (18) in an inwardly direction toward the shoulder portion (13) causing increasing sealing contact between the seal member (17) and the shoulder portion (13).
    Type: Grant
    Filed: March 3, 1995
    Date of Patent: July 15, 1997
    Assignee: Dionex Corporation
    Inventors: Norman J. Rothe, Gary L. Gleave