Patents by Inventor Stefan Fruh

Stefan Fruh 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).

  • Melting and holding furnace
    Patent number: 4781581
    Abstract: Melting and holding furnace in which melting (1) and holding (2) chambers are separated from one another, and are connected via openings (6). The holding chamber is designed to be deeper in order to receive the melt which flows out of the melting chamber (1). The chimney (18) through which the burnt gases produced during heating of the melting chamber (1) pass is arranged in the cover (14) of the holding chamber (2), namely at the end of the holding chamber (2) opposite to the openings (6).
    Type: Grant
    Filed: May 21, 1987
    Date of Patent: November 1, 1988
    Assignee: Bleiwenz GmbH
    Inventors: Gerhard Bleickert, Stefan Fruh