Patents by Inventor Alfred Wurm

Alfred Wurm 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).

  • Filtering device for the preparation of coffee
    Patent number: 3983797
    Abstract: A filtering device for the preparation of coffee comprises a vessel with a permanent metallic filter disk forming the bottom thereof. Vertically extending walls divide the vessel into distinct compartments of varying volumetric content, thus separating distinct areas of the filter disk. A water inlet is provided for one of the compartments in which the coffee powder is placed so that the amount of water used at any one time determines the active area of the filter disk utilized by virtue of the overflow between compartments.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: October 5, 1976
    Assignee: Interelectric Aktiengesellschaft
    Inventor: Alfred Wurm
  • Reusable coffee filter
    Patent number: 3943058
    Abstract: A device for the preparation of filtered coffee is described. It has a permanent filter disk which can be reused, thus eliminating the need for frequent replacement.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: March 9, 1976
    Assignee: Interelectric Aktiengesellschaft
    Inventor: Alfred Wurm