Patents by Inventor Dietmar M. Schoeffel

Dietmar M. Schoeffel 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).

  • High pressure fluorescence flow-through cuvette
    Patent number: 4088407
    Abstract: A cuvette for liquid chromatographic analysis and like determinations having a chamber through which the liquid being analyzed flows, a single optical body for directing exciting light to the chamber and emitted light to a detector and means for holding the optical body in intimate contact with the chamber.
    Type: Grant
    Filed: July 9, 1976
    Date of Patent: May 9, 1978
    Assignee: Schoeffel Instrument Corp.
    Inventors: Dietmar M. Schoeffel, Armin K. Sonnenschein
  • Multi-channel analyzer for liquid chromatographic separations
    Patent number: 4035086
    Abstract: Multi-channel analyzer for the optical comparison of sample fractions separated by liquid chromatography for detecting differences or ratios between, for example, reference and sample, solvent and sample, buffer and sample, or two different samples, having a single light source, a single dispersing element and a single collimating, refocusing optic for each spectrum produced, wherein the reference and sample passing through flow cuvettes are exposed and the ratio or difference between the optical characteristics of the reference and the sample are read.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: July 12, 1977
    Assignee: Schoeffel Instrument Corporation
    Inventors: Dietmar M. Schoeffel, Armin K. Sonnenschein
  • Multi-channel spectral analyzer for liquid chromatographic separations
    Patent number: 3985441
    Abstract: Multi-channel analyzer for the optical comparison of sample fractions separated by liquid chromatography for detecting differences or ratios between, for example, reference and sample, solvent and sample, buffer and sample, or two different samples, having a single light source, a single dispersing element and a single collimating, refocusing optic for each spectrum produced, wherein the reference and sample passing through flow cuvettes are exposed and the ratio or difference between the optical characteristics of the reference and the sample are read.
    Type: Grant
    Filed: March 13, 1974
    Date of Patent: October 12, 1976
    Assignee: Schoeffel Instrument Corporation
    Inventors: Dietmar M. Schoeffel, Armin K. Sonnenschein