Patents by Inventor Erik Severin

Erik Severin 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).

  • Trace level detection of analytes using artificial olfactometry
    Publication number: 20010041366
    Abstract: The present invention provides methods for detecting the presence of an analyte indicative of various medical conditions, including halitosis, periodontal disease and other diseases are also disclosed.
    Type: Application
    Filed: May 14, 2001
    Publication date: November 15, 2001
    Inventors: Nathan Lewis, Erik Severin, Bernard Wong, David Kelso, Beth Munoz
  • Sensors for detecting analytes in fluids
    Patent number: 6093308
    Abstract: Chemical sensors for detecting analytes in fluids comprise first and second conductive elements (e.g., electrical leads) electrically coupled to and separated by a chemically sensitive resistor which provides an electrical path between the conductive elements. The resistor comprises a plurality of alternating nonconductive regions (comprising a nonconductive organic polymer) and conductive regions (comprising a conductive material) transverse to the electrical path. The resistor provides a difference in resistance between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration. Arrays of such sensors are constructed with at least two sensors having different chemically sensitive resistors providing dissimilar such differences in resistance.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: July 25, 2000
    Assignee: California Institute of Technology
    Inventors: Nathan S. Lewis, Erik Severin
  • Sensors for detecting analytes in fluids
    Patent number: 5911872
    Abstract: Chemical sensors for detecting analytes in fluids comprise first and second conductive elements (e.g., electrical leads) electrically coupled to and separated by a chemically sensitive resistor which provides an electrical path between the conductive elements. The resistor comprises a plurality of alternating nonconductive regions (comprising a nonconductive organic polymer) and conductive regions (comprising a conductive material) transverse to the electrical path. The resistor provides a difference in resistance between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration. Arrays of such sensors are constructed with at least two sensors having different chemically sensitive resistors providing dissimilar such differences in resistance.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: June 15, 1999
    Assignee: California Institute of Technology
    Inventors: Nathan S. Lewis, Erik Severin
  • Sensors for detecting analytes in fluids
    Patent number: 5788833
    Abstract: Chemical sensors for detecting analytes in fluids comprise first and second conductive elements (e.g., electrical leads) electrically coupled to and separated by a chemically sensitive resistor which provides an electrical path between the conductive elements. The resistor comprises a plurality of alternating nonconductive regions (comprising a nonconductive organic polymer) and conductive regions (comprising a conductive material) transverse to the electrical path. The resistor provides a difference in resistance between the conductive elements when contacted with a fluid comprising a chemical analyte at a first concentration, than when contacted with a fluid comprising the chemical analyte at a second different concentration. Arrays of such sensors are constructed with at least two sensors having different chemically sensitive resistors providing dissimilar such differences in resistance.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: August 4, 1998
    Assignee: California Institute of Technology
    Inventors: Nathan S. Lewis, Erik Severin