Patents Assigned to Stefan Herzog
  • Filter aid
    Patent number: 6615991
    Abstract: A filter aid, in particular for filtering beverages by means of precoated filters, comprises a mixture of exclusively natural components, e.g. cellulose components. The filter aid is made only of sustainable raw materials and can be degraded almost totally in a natural way.
    Type: Grant
    Filed: September 27, 2000
    Date of Patent: September 9, 2003
    Assignee: Stefan Herzog
    Inventor: Josef Otto Rettenmaier