Patents by Inventor Fuquan Gao

Fuquan Gao 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).

  • Detection of foaming contaminants in containers using image processing
    Patent number: 5536935
    Abstract: To detect a foaming contaminant in a moving container, an image of the moving container and any contents thereof is produced. Thereafter, image processing techniques are used to determine levels of low and high frequency spatial variations in intensity in the image. The levels of low and high frequency spatial variations in intensity are then compared to determine the presence of a foaming contaminant.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: July 16, 1996
    Assignee: Thermedics Detection, Inc.
    Inventors: Helmut W. Klotzsch, Eugene K. Achter, Fuquan Gao, Craig D. Thompson, Glenn R. Gray, Jose A. Santos
  • Detection of turbid contaminants in containers by detecting scattered radiant energy
    Patent number: 5486693
    Abstract: To detect a turbid contaminant in a moving container, radiant energy having a wavelength that is absorbed by contents of the moving container that include the turbid contaminant at a different level than energy having the wavelength is absorbed by contents of the moving container that include a non-contaminant is directed into the container. Thereafter, a level of radiant energy scattered by contents of the container is detected. The presence of a turbid contaminant is indicated when the detected level of scattered radiant energy differs from a threshold level.
    Type: Grant
    Filed: November 8, 1994
    Date of Patent: January 23, 1996
    Assignee: Thermedics Detection Inc.
    Inventors: Eugene K. Achter, Helmut W. Klotzsch, Craig D. Thompson, Fuquan Gao, Jonathan E. Bosworth