Patents by Inventor Robert A. Rhoads

Robert A. Rhoads 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).

  • Patent number: 4838688
    Abstract: A high sensitivity fluorescence and absorption detector comprising an elongated substantially cylindrical flow cell connected to and receiving the outflow of a fluid chromatography column; a mechanism for projecting a fluorescence generating beam of electromagnetic energy along on an axis substantially coincident with the axis of the flow cell; the flow cell including an elongated substantially cylindrical midsection housed by a tubular capillary transparent to the fluorescent radiation generated by the beam; a fluorescence integrating sphere completely surrounding the midsection of the capillary, the integrating sphere collecting at least about 3 pi steradian of the fluorescent radiation emanating through the capillary tube and into the sphere; the beam being projected to enter one end of the cylindrical flow cell, focus at about the center point of the axis of the cylindrical midsection, emanate through the other end of the flow cell and impinge upon a photodetector for detecting the portion of the beam whi
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: June 13, 1989
    Inventor: Robert Rhoads