Patents by Inventor Egon Stahl

Egon Stahl 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 extractive production of valuable natural waxes
    Patent number: 4548755
    Abstract: Process for the extractive production of valuable, natural waxes from fossil and/or freshly grown vegetable and/or animal starting material by extraction of the starting material in an extraction stage with a physiologically unobjectionable gas at supercritical pressure and temperature conditions, separation of the extract-containing gas in a separator part by pressure reduction and/or temperature change, periodical or continuous withdrawal of the extract and return of the separated gas to the extraction stage.
    Type: Grant
    Filed: February 24, 1983
    Date of Patent: October 22, 1985
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Egon Stahl, Karl-Werner Quirin