Patents Assigned to Hopfen-Extraktion HVG Bart, Raiser & Co.
  • Process for the extraction of nonpolar constituents from plant material
    Patent number: 4946695
    Abstract: This invention relates to a process for extracting nonpolar constituents from natural substances such as hops with simultaneous separation of residues of nonpolar plant protectives (fungicides/insecticides). In a first step, the plant protective as well as other ingredients that are soluble under the chosen conditions is 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: March 31, 1989
    Date of Patent: August 7, 1990
    Assignee: Hopfen-Extraktion HVG Bart, Raiser & Co.
    Inventors: Adrian Forster, Stefan Geyer, Josef Schulmeyr, Roland Schmidt, Manfred Gehrig
  • 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