Patents Assigned to Zoex Licensing Corporation
  • Method and apparatus for measuring velocity of chromatographic pulse
    Patent number: 7258726
    Abstract: An Apparatus and method for two-stage chromatographic separation uses thermal modulation. The chromatographic column or modulation tube (1) has a loop structure such that two portions of modulation tube (1) can be thermally modulated simultaneously by at least one thermal modulation device, which device can have a cold gas source, jet tube (2), and a hot gas source, hot jet tube (5), to modulate the temperature of the portions (3, 4) of modulation tube (1).
    Type: Grant
    Filed: March 19, 2002
    Date of Patent: August 21, 2007
    Assignee: Zoex Licensing Corporation
    Inventor: Edward B. Ledford, Jr.