Patents by Inventor Frederick Prout

Frederick Prout 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 defects in protective barriers
    Patent number: 6204669
    Abstract: The invention includes apparatus and method for detecting defects in various barrier materials including surgical gloves and food packaging. Voltage is applied across electrodes and a barrier material and the voltage measured and compared with voltage control measurements for the same barrier material without a defect. Sensitivity of measurements is increased by adjusting partial pressure across the barrier material which is subjected to the passage of an ionized gas detected by suitable instrumentation.
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: March 20, 2001
    Assignee: Drexel University
    Inventors: Richard B. Beard, Kambiz Pourrezaei, Shengke Zeng, Frederick Prout, Frank M. Kepics, Jin Park, Allen Rothwarf, Siddharth Deliwala, Robert Schmukler
  • Method and apparatus for testing a protective barrier material for pinholes and tear strength
    Patent number: 5196799
    Abstract: A method and apparatus for the non-destructive testing of a protective baer material. In a preferred embodiment, the method comprises applying an alternating electrical current across the protective barrier material for establishing a conductivity, G, of the protective barrier material and/or a quality factor, Q, of the protective barrier material. The conductivity, G, and/or the quality factor, Q, are measured at more than one frequency. The quality factor and/or conductivity measurements so obtained at the more than one frequency are compared to predetermined quality factor and/or conductivity limits.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: March 23, 1993
    Assignees: Drexel University, United States of America as represented by the Food & Drug Administration
    Inventors: Richard B. Beard, Robert Schmukler, Herman P. Schwan, Frederick Prout