Patents by Inventor Dieter E. Janchen

Dieter E. Janchen 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).

  • Monochromator for simultaneous selection and utilization of two wave-lengths
    Patent number: 4140399
    Abstract: A monochromator for the simultaneous selection and utilization of two wavelengths of small and constant band width, whereby the wavelengths may be selected and rapidly changed as desired. The monochromator is particularly suitable for the simultaneous scanning of a chromatogram (e.g. a thin-layer chromatogram) with two wavelengths to determine the concentration of a certain material independently of disturbing influences of the matrix. This is done by photosensors which are adapted to be led on pivot arms on a circular arc about the element dispersing the light.
    Type: Grant
    Filed: February 3, 1977
    Date of Patent: February 20, 1979
    Assignee: CAMAG Chemie-Erzeugnisse und Adsorptionstechnik AG
    Inventor: Dieter E. Janchen