Patents by Inventor W. Preston Dill

W. Preston Dill 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).

  • Method and automated apparatus for detecting coliform organisms
    Patent number: 4204037
    Abstract: Method and automated apparatus are disclosed for determining the time of detection of metabolically produced hydrogen by coliform bacteria cultured in an electroanalytical cell from the time the cell is inoculated with the bacteria. The detection time data provides bacteria concentration values. The apparatus is sequenced and controlled by a digital computer to discharge a spent sample, clean and sterilize the culture cell, provide a bacteria nutrient into the cell, control the temperature of the nutrient, inoculate the nutrient with a bacteria sample, measures the electrical potential difference produced by the cell and measures the time of detection from inoculation.
    Type: Grant
    Filed: April 4, 1978
    Date of Patent: May 20, 1980
    Inventors: Robert A. Administrator of the National Aeronautics and Space Administration, with respect to an invention of Frosch, W. Preston Dill, Rueben E. Taylor, Eldon L. Jeffers