Patents by Inventor Stefan Geyer

Stefan Geyer 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 extraction of nonpolar constituents of hops
    Patent number: 4842878
    Abstract: The invention relates to a process for extracting nonpolar constituents from hops with simultaneous separation of residues of nonpolar plant protectives. In a first step the plant protective as well as other ingredients that are soluble under the chosen conditions are extracted with compressed gases, and in a subsequent stage the dissolved mixture is passed through an adsorbent and the plant protective is selectively removed from the mixture.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: June 27, 1989
    Assignee: Hopfen-Extraktion HVG Bart, Raiser & Co.
    Inventors: Adrian Forster, Stefan Geyer, Josef Schulmeyr, Roland Schmidt, Manfred Gehrig