Patents by Inventor Gerrit H. D. van der Stegen

Gerrit H. D. van der Stegen 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 extracting caffeine from solutions thereof in carbon dioxide under high pressure
    Patent number: 4364965
    Abstract: Extraction of caffeine from solutions thereof is accomplished with carbon dioxide under high pressure, using adsorbents which combine a high adsorption capacity for caffeine with such hydrophilic properties that the caffeine-laden adsorbent can be regenerated using water only.
    Type: Grant
    Filed: August 29, 1980
    Date of Patent: December 21, 1982
    Assignee: D.E.J. International Research Company B.V.
    Inventors: Gerrit H. D. van der Stegen, Hendricus G. J. de Wilt
  • Process of the decaffeination of green coffee beans
    Patent number: 4364964
    Abstract: A process for removal of caffeine from green coffee beans is disclosed by extraction with an aqueous liquid and preferential adsorption of caffein from the extract by means of a synthetic polymer resin of the type that is obtainable by polymerization or copolymerization of monomers containing aromatic ring systems and acid groups, and whereby the ratio of the total adsorption capacity for caffein to the total ion exchange capacity is larger than about 1 and smaller than about 25.
    Type: Grant
    Filed: August 27, 1980
    Date of Patent: December 21, 1982
    Assignee: D.E.J. International Research Company B.V.
    Inventor: Gerrit H. D. van der Stegen