Patents by Inventor Walter Heigel

Walter Heigel 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).

  • Process for the production of pure lecithin directly usable for physiological purposes
    Patent number: 4367178
    Abstract: Disclosed is a process for the production from raw lecithin of pure lecithin directly usable for physiological purposes, comprising the steps of contacting raw lecithin with gas as the extraction medium under supercritical conditions with respect to pressure and temperature in an extraction stage to produce a gas containing an extract; passing the gas containing the extract from the extraction stage into a separation stage; varying at least one of the pressure and the temperature of the gas in the separation stage to separate the extract-containing gas into the gas and the extract; recycling the gas after the step of varying the pressure and/or temperature; and removing pure lecithin from the extraction stage.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: January 4, 1983
    Assignee: Kali-Chemie Pharma GmbH
    Inventors: Walter Heigel, Rolf Hueschens