Patents by Inventor Robert Jeffrey Runyan

Robert Jeffrey Runyan 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).

  • Sample and carrier gas pre-heat system for gas chromatograph
    Patent number: 6575015
    Abstract: A novel gas chromatograph includes suitably located backpressure restrictors. In a preferred embodiment, each backpressure restrictor consists of capillary tubing with a pressure drop across it controlled to be less than or slightly greater than 0.528. One embodiment places the backpressure restrictor upstream of an initial stream switching valve and downstream of sample pre-heat coil. Another embodiment places the backpressure restrictor downstream of the gas chromatograph's measurement element and its carrier pre-heat coil. In each case, only a controlled and predictable flow rate is achieved, both regulating the flow rate through the system and back pressuring fluid to remain in the respective pre-heat coils to achieve ideal temperature.
    Type: Grant
    Filed: April 24, 2001
    Date of Patent: June 10, 2003
    Assignee: Daniel Industries, Inc.
    Inventors: Teresa Lechner-Fish, Robert Jeffrey Runyan
  • Sample and carrier gas pre-heat system for gas chromatograph
    Publication number: 20020166364
    Abstract: A novel gas chromatograph includes suitably located backpressure restrictors. In a preferred embodiment, each backpressure restrictor consists of capillary tubing with a pressure drop across it controlled to be less than or slightly greater than 0.528. One embodiment places the backpressure restrictor upstream of an initial stream switching valve and downstream of sample pre-heat coil. Another embodiment places the backpressure restrictor downstream of the gas chromatograph's measurement element and its carrier pre-heat coil. In each case, only a controlled and predictable flow rate is achieved, both regulating the flow rate through the system and back pressuring fluid to remain in the respective pre-heat coils to achieve ideal temperature.
    Type: Application
    Filed: April 24, 2001
    Publication date: November 14, 2002
    Inventors: Teresa Lechner-Fish, Robert Jeffrey Runyan