Patents by Inventor Karla Ewalt

Karla Ewalt 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).

  • Publication number: 20050173247
    Abstract: The present invention relates generally to microtiter plate format devices and methods for separating molecules having different net charges. The devices and methods of the invention are particularly suited for use in high-throughput screening to monitor enzymatic reactions which result in a product having an altered net charge. For example, the systems and methods disclosed herein may be used to detect the activity of phosphatases, proteases and kinases on various peptidic substrates under various conditions.
    Type: Application
    Filed: November 4, 2004
    Publication date: August 11, 2005
    Inventors: Shila Jalali, Karla Ewalt, Paul Swanson, Brian Dwyer, Michael Heller, John Havens, Eugene Tu
  • Patent number: 6887362
    Abstract: This invention relates to devices and methods for performing active, multi-step molecular and biological sample preparation and diagnostic analyses employing immunochemical techniques. It relates generally to bioparticle separation, bioparticle enrichment, and electric field-mediated immunochemical detection on active electronic matrix devices utilizing AC and DC electric fields. More specifically, the invention relates to devices and methods for sample preparation/manipulation, immunoimmobilization, and immunoassays, all of which can be conducted on one or more active electronic chip devices within a single system. These manipulations are useful in a variety of applications, including, for example, detection of pathogenic bacteria and biological warfare agents, point-of-care diagnostics, food or medical product quality control assays, and other biological assays.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: May 3, 2005
    Assignee: Nanogen, Inc.
    Inventors: Ying Huang, Karla Ewalt, Robert Haigis, Anita Forster, Michael K. Krihak
  • Publication number: 20030146100
    Abstract: This invention relates to devices and methods for performing active, multi-step molecular and biological sample preparation and diagnostic analyses employing immunochemical techniques. It relates generally to bioparticle separation, bioparticle enrichment, and electric field-mediated immunochemical detection on active electronic matrix devices utilizing AC and DC electric fields. More specifically, the invention relates to devices and methods for sample preparation/manipulation, immunoimmobilization, and immunoassays, all of which can be conducted on one or more active electronic chip devices within a single system. These manipulations are useful in a variety of applications, including, for example, detection of pathogenic bacteria and biological warfare agents, point-of-care diagnostics, food or medical product quality control assays, and other biological assays.
    Type: Application
    Filed: February 6, 2002
    Publication date: August 7, 2003
    Applicant: NANOGEN, INC.
    Inventors: Ying Huang, Karla Ewalt, Robert Haigis, Anita H. Forster, Michael K. Krihak