Patents by Inventor Armin Etzel

Armin Etzel 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).

  • Apparatus for the preparation of alkali metal monofluorhosphates
    Patent number: 5198088
    Abstract: An apparatus for the preparation of alkali metal monofluorophosphates is disclosed. The apparatus includes a melting crucible of a platinum/rhodium alloy, devices for feeding the alkali metal fluoride and alkali metal metaphosphate or alkali metal polyphosphate raw materials into the upper part of the crucible, an outflow orifice for molten alkali metal fluorophosphate in the bottom of the crucible, a corresponding discharge orifice in the furnace, and a cooling arrangement, wherein a direct voltage is applied between the cooling arrangement and the melting crucible which is connected as the anode.
    Type: Grant
    Filed: January 16, 1991
    Date of Patent: March 30, 1993
    Assignee: BK Ladenburg GmbH Gesellschaft fuer Chemische Erzeugnisse
    Inventors: Armin Etzel, Richard Taenzler, Alexander Maurer, Gerhard Schoenmann, Hans-Georg Steinert