Patents by Inventor Roberto Siegert

Roberto Siegert 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).

  • Method for producing a layer system comprising a metallic carrier and an anode functional layer
    Patent number: 7582374
    Abstract: The aim of the invention is to produce complete high temperature fuel cells by means of thermal injection processes (e.g. atmospheric plasma injection, vacuum plasma injection, high speed flame injection). The production method is especially simplified and is economical by virtue of the fact that the carrier substrate is also produced on a base with the aid of a thermal injection method. The base or an intermediate layer placed thereon can be advantageously dissolved or decomposed such that the carrier substrate provided with layers arranged thereon can be separated in a very simple manner from the base which becomes unnecessary. Said method advantageously enables the production of all layers of a high temperature fuel cell, exclusively with the aid of a thermal injection method.
    Type: Grant
    Filed: February 6, 2004
    Date of Patent: September 1, 2009
    Assignee: Forschungszentrum Julich GmbH
    Inventors: Robert Vassen, Dag Hathiramani, Hans Peter Buchkremer, Frank Tietz, Jens-Erich Döring, Roberto Siegert, Franziska Traeger, Detlev Stöver
  • Production of a Gas-Tight, Crystalline Mullite Layer by Using a Thermal Spraying Method
    Publication number: 20080193674
    Abstract: The invention relates to a method for producing a tight crystalline mullite layer on a metallic and/or ceramic substrate by using the plasma spraying technique. To this end, a sol containing mullite precursors with a proportion of 2 to 25% by weight with regard to the oxides (3 Al2O3/2 SiO2) is used as a spraying additive. This method is carried out under atmospheric conditions, and the sol is injected with a focussed jet and with an overpressure of at least one I bar into the plasma flame. An additional compacting of the layer can be advantageously effected by repeatedly passing over the layer with the plasma flame. The method is particularly suited for applying a gas-tight crystalline mullite layer to a steel substrate.
    Type: Application
    Filed: September 17, 2005
    Publication date: August 14, 2008
    Inventors: Roberto Siegert, Silke Latzel, Ralf Hansch, Detlev Stover, Robert Vassen
  • Method for producing a layer system comprising a metallic carrier and an anode functional layer
    Publication number: 20070042112
    Abstract: The aim of the invention is to produce complete high temperature fuel cells by means of thermal injection processes (e.g. atmospheric plasma injection, vacuum plasma injection, high speed flame injection). The production method is especially simplified and is economical by virtue of the fact that the carrier substrate is also produced on a base with the aid of a thermal injection method. The base or an intermediate layer placed thereon can be advantageously dissolved or decomposed such that the carrier substrate provided with layers arranged thereon can be separated in a very simple manner from the base which becomes unnecessary. Said method advantageously enables the production of all layers of a high temperature fuel cell, exclusively with the aid of a thermal injection method.
    Type: Application
    Filed: February 6, 2004
    Publication date: February 22, 2007
    Inventors: Robert Vassen, Dag Hathiramani, Hans Buchkremer, Frank Tietz, Jens-Erich Doring, Roberto Siegert, Franziska Traeger, Detlev Stover