Patents by Inventor Frank J. Swenson

Frank J. Swenson 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).

  • Measurement of color reactions by monitoring a change of fluorescence
    Patent number: 5565328
    Abstract: The present invention relates to a method to determine the concentration of an unknown substance in a colorimetric reaction using a fluorometric reader. The change in color can be monitored by observing the change of fluorescence of a known amount of a suitable fluorophore in the reaction chamber. Under appropriate conditions the absorption spectrum of the chromophore overlaps with the emission spectrum of the fluorophore thereby allowing the change in fluorescence to be proportional to the intensity of color in the reaction and thus, proportional to the quantity of the substance of interest. Specifically, 8-methoxypyrene tri-sulfonic acid is used as the fluorophore.
    Type: Grant
    Filed: December 27, 1995
    Date of Patent: October 15, 1996
    Assignee: Dade International Inc.
    Inventors: Shoshana Bascomb, Frank J. Swenson, Ted Sand