Patents by Inventor Richard R. Papenfuss

Richard R. Papenfuss 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).

  • Continuous flow apparatus and method for interfacing liquid chromatograph and fourier transform infrared spectrometer
    Patent number: 5538643
    Abstract: Apparatus for interfacing a liquid chromatograph (LC) with a spectrometer such as a Fourier transform infrared spectrometer, the LC having an eluant, the eluant containing a solvent and a component of interest. The apparatus includes five basic parts. The first is a means for generating a stream of droplets of the eluant, such as a nebulizer. The second is a means for removing most of the solvent from the stream of droplets of the eluant to thereby generate a stream of particles, the particles containing the component of interest and any residual solvent, such as a membrane solvent separator/momentum separator combination. The third is a cryogenic receiving surface, such as a gold drum.
    Type: Grant
    Filed: May 2, 1995
    Date of Patent: July 23, 1996
    Assignee: The Dow Chemical Company
    Inventors: George J. Kallos, Richard R. Papenfuss