Patents by Inventor Douglas T. Gierde

Douglas T. Gierde 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).

  • Open channel solid phase extraction systems and methods
    Patent number: 7667010
    Abstract: The invention provides, inter alia, methods of extracting an analyte from a solution comprising the steps of: passing a solution containing an analyte through an extraction channel having a solid phase extraction surface, whereby analyte adsorbs to the extraction surface of said extraction channel; purging bulk liquid from said extraction channel; and eluting the analyte by passing a desorption solvent through the channel. The invention further provides reagents, columns and instrumentation related to this and other methods.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: February 23, 2010
    Assignee: PhyNexus, Inc.
    Inventors: Douglas T. Gierde, Christopher T. Hanna
  • Method and device for extracting an analyte
    Publication number: 20040142488
    Abstract: The invention provides extraction columns for the purification of an analyte (e.g., a biological macromolecule, such as a peptide, protein or nucleic acid) from a sample solution, as well as methods for making and using such columns. The columns typically include a bed of extraction media positioned in the column between two frits. In some embodiments, the extraction columns employ modified pipette tips as column bodies.
    Type: Application
    Filed: January 8, 2004
    Publication date: July 22, 2004
    Inventors: Douglas T. Gierde, Christopher T. Hanna