Patents by Inventor Xiaogan Li

Xiaogan Li 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).

  • Robust high temperature composite and CO sensor made from such composite
    Patent number: 7694547
    Abstract: Described herein is a composite exhibiting a change in electrical resistance proportional to the concentration of a reducing gas present in a gas mixture, detector and sensor devices comprising the composite, a method for making the composite and for making devices comprising the composite, and a process for detecting and measuring a reducing gas in an atmosphere. In particular, the reducing gas may be carbon monoxide and the composite may comprise rutile-phase TiO2 particles and platinum nanoclusters. The composite, upon exposure to a gas mixture containing CO in concentrations of up to 10,000 ppm, exhibits an electrical resistance proportional to the concentration of the CO present. The composite is useful for making sensitive, low drift, fast recovering detectors and sensors, and for measuring CO concentrations in a gas mixture present at levels from sub-ppm up to 10,000 ppm. The composites, and devices made from the composites, are stable and operable in a temperature range of from about 450° C.
    Type: Grant
    Filed: February 29, 2008
    Date of Patent: April 13, 2010
    Assignee: The Ohio State University Research Foundation
    Inventors: Prabir K. Dutta, Ramamoorthy Ramasamy, Xiaogan Li, Sheikh A. Akbar
  • ROBUST HIGH TEMPERATURE COMPOSITE AND CO SENSOR MADE FROM SUCH COMPOSITE
    Publication number: 20080209982
    Abstract: Described herein is a composite exhibiting a change in electrical resistance proportional to the concentration of a reducing gas present in a gas mixture, detector and sensor devices comprising the composite, a method for making the composite and for making devices comprising the composite, and a process for detecting and measuring a reducing gas in an atmosphere. In particular, the reducing gas may be carbon monoxide and the composite may comprise rutile-phase TiO2 particles and platinum nanoclusters. The composite, upon exposure to a gas mixture containing CO in concentrations of up to 10,000 ppm, exhibits an electrical resistance proportional to the concentration of the CO present. The composite is useful for making sensitive, low drift, fast recovering detectors and sensors, and for measuring CO concentrations in a gas mixture present at levels from sub-ppm up to 10,000 ppm. The composites, and devices made from the composites, are stable and operable in a temperature range of from about 450° C.
    Type: Application
    Filed: February 29, 2008
    Publication date: September 4, 2008
    Inventors: Prabir K. Dutta, Ramamoorthy Ramasamy, Xiaogan Li, Sheikh A. Akbar