Patents by Inventor Michael K. Krihak

Michael K. Krihak 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: 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: 20040077074
    Abstract: A device includes an inlet for receipt of a sample. A first chamber is coupled to the inlet and includes at least one affinity region. A second chamber is disposed adjacent to the first chamber. The first chamber and the second chamber share a common intermediate member, the intermediate member having at least one via formed in the common intermediate member. The second chamber includes an assay chip comprising an array of addressable electrodes. An outlet is coupled to the second chamber. The device may be used to selectively amplify and elute nucleic acids for subsequent detection and analysis.
    Type: Application
    Filed: October 14, 2003
    Publication date: April 22, 2004
    Applicant: Nanogen, Inc.
    Inventors: Donald E. Ackley, Edward L. Sheldon, Michael K. Krihak
  • Patent number: 6638482
    Abstract: Methods and apparatus for use of a stacked, reconfigurable system is provided. The stacked, reconfigurable system includes an inlet for receipt of a sample, a first chamber defined by a bottom support, an intermediate member, and a first spacer, the first chamber being coupled to the inlet through the bottom support, the first chamber including an analysis system having electrodes for electrophoretic transport of material. A second chamber is stacked on top of the first chamber, the second chamber being defined by the intermediate member, a top member, and a second spacer, the second chamber being in fluid communication with the first chamber through at least one via formed in the intermediate member, the second chamber being electrically reconfigurable to permit action such as, for example, synthesis of a compound or specialized analysis. The apparatus can be used to perform analysis on charged biological materials.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: October 28, 2003
    Assignee: Nanogen, Inc.
    Inventors: Donald E. Ackley, Edward L. Sheldon, 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
  • Publication number: 20020085954
    Abstract: The present invention pertains to a method of, and a device created by, depositing an inorganic permeation layer on a micro-electronic device for molecular biological reactions. The permeation layer is preferably sol-gel. The sol-gel permeation layer can be created with pre-defined porosity, pore size distribution, pore morphology, and surface area. The sol-gel permeation layer may also function as the attachment layer of the micro-electric device.
    Type: Application
    Filed: October 22, 2001
    Publication date: July 4, 2002
    Applicant: Nanogen, Inc.
    Inventors: John R. Havens, Michael K. Krihak, Charles H. Greef, Daniel E. Raymond, Michael J. Heller
  • Patent number: 6375899
    Abstract: Methods, apparatus, and applications for use of a stacked, reconfigurable system for electrophoretic transport are provided. In one embodiment, a system having a first chamber including at least a bottom support and an intermediate support, and a second chamber, said second chamber including a bottom support and a top member, the first and second chambers being coupled through a via. Electrophoretic, and optional electro-osmotic and thermal, transport is effected. In another aspect of this invention, three or more chambers are coupled by an electrophoretic buss. The electrophoretic buss includes driving electrodes and is adapted to receive fluid containing materials for transport. The chambers are coupled to the electrophoretic buss and serve as a tap from the buss for delivery of charged materials. In one embodiment, certain functions are performed in different chambers.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: April 23, 2002
    Assignee: Nanogen, Inc.
    Inventors: Donald E. Ackley, Edward L. Sheldon, Michael K. Krihak
  • Patent number: 6319472
    Abstract: Methods, apparatus, and applications for use of a stacked, reconfigurable system for electrophoretic transport are provided. In one embodiment, a system having a first chamber including at least a bottom support and an intermediate support, and a second chamber, said second chamber including a bottom support and a top member, the first and second chambers being coupled through a via. Electrophoretic, and optional electro-osmotic and thermal, transport is effected. In another aspect of this invention, three or more chambers are coupled by an electrophoretic buss. The electrophoretic buss includes driving electrodes and is adapted to receive fluid containing materials for transport. The chambers are coupled to the electrophoretic buss and serve as a tap from the buss for delivery of charged materials. In one embodiment, certain functions are performed in different chambers.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: November 20, 2001
    Assignee: Nanogen, Inc.
    Inventors: Donald E. Ackley, Edward L. Sheldon, Michael K. Krihak
  • Patent number: 6309602
    Abstract: Methods, apparatus, and applications for use of a stacked, reconfigurable system for electrophoretic transport are provided. In one embodiment, a system having a first chamber including at least a bottom support and an intermediate support, and a second chamber, said second chamber including a bottom support and a top member, the first and second chambers being coupled through a via. Electrophoretic, and optional electro-osmotic and thermal, transport is effected. In another aspect of this invention, three or more chambers are coupled by an electrophoretic buss. The electrophoretic buss includes driving electrodes and is adapted to receive fluid containing materials for transport. The chambers are coupled to the electrophoretic buss and serve as a tap from the buss for delivery of charged materials. In one embodiment, certain functions are performed in different chambers.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: October 30, 2001
    Assignee: Nanogen, Inc.
    Inventors: Donald E. Ackley, Edward L. Sheldon, Michael K. Krihak
  • Patent number: 6306348
    Abstract: The present invention pertains to a method of, and a device created by, depositing an inorganic permeation layer on a micro-electronic device for molecular biological reactions. The permeation layer is preferably sol-gel. The sol-gel permeation layer can be created with pre-defined porosity, pore size distribution, pore morphology, and surface area. The sol-gel permeation layer may also function as the attachment layer of the micro-electric device.
    Type: Grant
    Filed: July 15, 1999
    Date of Patent: October 23, 2001
    Assignee: Nanogen, Inc.
    Inventors: John R. Havens, Michael K. Krihak, Charles H. Greef, Daniel E. Raymond, Michael J. Heller