Patents by Inventor Gunnar Walther

Gunnar Walther 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).

  • Publication number: 20240116041
    Abstract: A method of manufacturing a catalyst material includes the steps of: providing a body having an open-porous foam structure and comprising at least a first metal or alloy; providing particles, each of which particles comprising at least a second metal or alloy; distributing the particles on the body; forming a structural connection between each of at least a subset of the particles and the body; and forming an oxide film on at least the subset of the particles and the body, wherein the oxide film has a catalytically active surface.
    Type: Application
    Filed: December 20, 2023
    Publication date: April 11, 2024
    Inventors: Lars TORKUHL, Robin KOLVENBACH, JungSuk BAE, Andreas TILLMANN, Alexandra GERSTLE, Gunnar WALTHER, Tilo BÜTTNER, Hans-Dietrich BÖHM, Bernd KIEBACK, Thomas WEISSGÄRBER, Arne BODEN
  • Patent number: 11883811
    Abstract: A method of manufacturing a catalyst material includes the steps of: providing a body having an open-porous foam structure and comprising at least a first metal or alloy; providing particles, each of which particles comprising at least a second metal or alloy; distributing the particles on the body; forming a structural connection between each of at least a subset of the particles and the body; and forming an oxide film on at least the subset of the particles and the body, wherein the oxide film has a catalytically active surface.
    Type: Grant
    Filed: July 16, 2019
    Date of Patent: January 30, 2024
    Assignees: ALANTUM EUROPE GMBH, FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Lars Torkuhl, Robin Kolvenbach, JungSuk Bae, Andreas Tillmann, Alexandra Gerstle, Gunnar Walther, Tilo Büttner, Hans-Dietrich Böhm, Bernd Kieback, Thomas Weissgärber, Arne Boden
  • Patent number: 11548067
    Abstract: An open-pored metal body, which is formed having a core layer (A) consisting of Ni, Co, Fe, Cu, Ag or an alloy formed having one of said chemical elements, wherein one of said chemical elements is present in the alloy at more than 25 at %, and a gradated layer (B) is formed on surfaces of the core layer (A), said gradated layer being formed by intermetallic phase or mixed crystals of Al, and a layer (C), which is formed having aluminum oxide, is formed on the gradated layer (B).
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: January 10, 2023
    Assignees: ALANTUM EUROPE GMBH, FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Gunnar Walther, Tilo Buettner, Hans-Dietrich Boehm, Bernd Kieback, Thomas Weissgaerber, Arne Boden, Rene Poss, Tillmann Andreas, Robin Kolvenbach, Lars Torkuhl, Alexandra Gerstle
  • Publication number: 20210316291
    Abstract: A method of manufacturing a catalyst material includes the steps of: providing a body having an open-porous foam structure and comprising at least a first metal or alloy; providing particles, each of which particles comprising at least a second metal or alloy; distributing the particles on the body; forming a structural connection between each of at least a subset of the particles and the body; and forming an oxide film on at least the subset of the particles and the body, wherein the oxide film has a catalytically active surface.
    Type: Application
    Filed: July 16, 2019
    Publication date: October 14, 2021
    Inventors: Lars TORKUHL, Robin KOLVENBACH, JungSuk BAE, Andreas TILLMANN, Alexandra GERSTLE, Gunnar WALTHER, Tilo BÜTTNER, Hans-Dietrich BÖHM, Bernd KIEBACK, Thomas WEISSGÄRBER, Arne BODEN
  • Publication number: 20210308762
    Abstract: An open-pored metal body, which is formed having a core layer (A) consisting of Ni, Co, Fe, Cu, Ag or an alloy formed having one of said chemical elements, wherein one of said chemical elements is present in the alloy at more than 25 at %, and a gradated layer (B) is formed on surfaces of the core layer (A), said gradated layer being formed by intermetallic phase or mixed crystals of Al, and a layer (C), which is formed having aluminum oxide, is formed on the gradated layer (B).
    Type: Application
    Filed: June 18, 2019
    Publication date: October 7, 2021
    Applicants: Alantum Europe GmbH, FRAUNHOFER-GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Gunnar WALTHER, Tilo BUETTNER, Hans-Dietrich BOEHM, Bernd KIEBACK, Thomas WEISSGAERBER, Arne BODEN, Rene POSS, Tillmann ANDREAS, Robin KOLVENBACH, Lars TORKUHL, Alexandra GERSTLE
  • Publication number: 20200276644
    Abstract: The invention relates to a method for producing open-pore molded metal bodies which have a modified surface. The surface of an open-pore molded metal body said molded body being used as a semi-finished product, is coated with particles of a chemical compound of a metal on particles of the metal which can be reduced or thermally or chemically decomposed in a thermal treatment. After the coating process, at least one thermal treatment is carried out, in which the produced metal particles are connected to the surface of the semi-finished product and/or adjacent produced particles via sintered necks or sintered bridges such that the specific surface area of the obtained open-pore molded body is increased to at least 30 m2/l and/or at least by a factor of 5 in comparison to the starting material of the uncoated metal semi-finished product.
    Type: Application
    Filed: September 14, 2018
    Publication date: September 3, 2020
    Applicants: Alantum Europe GmbH, Fraunhofer-Gesellschaft zur Foerderung Der Angewandten Forschung e.V.
    Inventors: Tilo BUETTNER, Gunnar WALTHER, Hans-Dietrich BOEHM, Thomas WEISSGAERBER, Bernd KIEBACK, Christian MUELLER, Robin KOLVENBACH, Lars TORKUHL
  • Publication number: 20200263306
    Abstract: A method for producing open-pored molded bodies made of a metal. The surface of the metal open-pored molded body being used as a semi-finished product, is coated with particles of the same metal with which the semi-finished product is made or with particles of a chemical compound of the metal the semi-finished product is made, wherein the compound or particles can be reduced or thermally or chemically decomposed in a thermal treatment. After the coating process, a thermal treatment in a suitable atmosphere is carried out, in which the particles are connected to the surface of the semi-finished product and/or adjacent particles such that the specific surface area of the obtained open-pore molded body is increased to at least 30 m2/l and/or at least by a factor of 5 in comparison to the starting material.
    Type: Application
    Filed: September 14, 2018
    Publication date: August 20, 2020
    Applicants: Alantum Europe GmbH, Fraunhofer-Gesellschaft zur Foerderung der Angewandten Forschung e.V.
    Inventors: Tilo BUETTNER, Gunnar WALTHER, Hans-Dietrich BOEHM, Thomas WEISSGAERBER, Bernd KIEBACK, Christian Immanuel MÜLLER, Robin KOLVENBACH, Lars TORKUHL
  • Patent number: 10596556
    Abstract: A metallic foam body containing an alloy skin which is up to 50 ?m thick can be obtained by a process including (a) providing a metallic foam body comprising a first metallic material; (b) applying a second metallic material which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the foam body (a), by coating the metallic foam body with an organic binder and a powder of the second metallic material; (c) forming a skin on foam body (b) by alloying the first and the second metallic material; and (d) leaching out with a leaching agent at least a part of the first and/or the second metallic compound.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: March 24, 2020
    Assignees: Alantum Europe GmbH, FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Dejan Radivojevic, Dirk Neumann, Shadi Saberi, Jungsuk Bae, Rene Poss, Tilo Büttner, Gunnar Walther, Hans-Dietrich Böhm, Thomas Weissgärber, Burghardt Klöden, Arne Boden
  • Patent number: 9346240
    Abstract: Disclosed are an open-porous metal foam and a method for manufacturing the same. An open-porous metal foam according to an exemplary embodiment of the present invention is made of an iron-based alloy including 15 wt % or more of chrome and 5 wt % or more of aluminum. The open-porous metal foam is a semi-product that is formed of iron or the iron-based alloy that does not include chrome and aluminum or includes a smaller amount of chrome and aluminum in the powder when manufacturing, and the surface and the open pore thereof are uniformly coated with the powder of the iron-chrome-aluminum alloy and the organic binding agent. When heat treatment is performed under a reduction atmosphere, sintering is performed.
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: May 24, 2016
    Assignees: ALANTUM, FRAUNHOFER GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Gunnar Walther, Burghardt Klöden, Juliane Böhm, Tilo Büttner, Thomas Weissgärber, Bernd Kieback, Arne Boden, Hans-Dietrich Böhm, Hyuntae Kim, James Choi, Myungjoon Jang, Alexander Böhm, Stefan Fröhlich, Winfried Dölling
  • Patent number: 8780527
    Abstract: In accordance with an embodiment of the disclosure, a method of making a supercapacitor includes impregnating a foam electrode substrate with an active material precursor, wherein the foam electrode substrate includes a plurality of pores and the active material precursor is dispersed into the pores. The method further includes reacting the active material precursor infiltrated foam substrate with a reductant under conditions sufficient to convert the active material precursor to an active material, wherein the active material is based on a nitride, an oxynitride, a carbide, or an oxycarbide of a metal selected from Groups III, IV, V, VI, or VII of the Periodic Table.
    Type: Grant
    Filed: October 12, 2011
    Date of Patent: July 15, 2014
    Assignees: The Regents of the University of Michigan, Fraunhofer-Gesellschaft zur Förderung der Angewandten Forschung E.V.
    Inventors: Levi T. Thompson, Paul Rasmussen, Gunnar Walther, Burghardt Kloeden
  • Patent number: 8758675
    Abstract: The invention relates to a method for fabricating an open-porous metal foam body with a nickel base alloy, to a metal foam body fabricated this way as well as advantageous applications for the separation of specific components and pollutants from fluid flows. On the occasion, according to the set object open-porous metal foam bodies which have improved mechanical properties, and in addition an enlarged specific surface and/or increased surface roughness are to be provided. During fabricating it is proceeded such that an open-porous base foam body made of nickel or a nickel base alloy is coated with a liquid binding agent. Subsequent to this, a mixture of a powdery nickel base alloy and an organic component the temperature of phase transformation of which is at least 30 degrees centigrade from its solid phase to the liquid phase is deposited. The temperature should then be below the respective temperature of phase transformation.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: June 24, 2014
    Assignees: Alantum Corporation, Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Alexander Böhm, Dirk Naumann, Tilo Büttner, Gunnar Walther, Shadi Saberi, Lloyd Timberg
  • Publication number: 20140004259
    Abstract: Disclosed are an open-porous metal foam and a method for manufacturing the same. An open-porous metal foam according to an exemplary embodiment of the present invention is made of an iron-based alloy including 15 wt % or more of chrome and 5 wt % or more of aluminum. The open-porous metal foam is a semi-product that is formed of iron or the iron-based alloy that does not include chrome and aluminum or includes a smaller amount of chrome and aluminum in the powder when manufacturing, and the surface and the open pore thereof are uniformly coated with the powder of the iron-chrome-aluminum alloy and the organic binding agent. When heat treatment is performed under a reduction atmosphere, sintering is performed.
    Type: Application
    Filed: August 28, 2013
    Publication date: January 2, 2014
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., ALANTUM
    Inventors: Gunnar Walther, Burghardt Klöden, Juliane Böhm, Tilo Büttner, Thomas Weissgärber, Bernd Kieback, Arne Boden, Hans-Dietrich Böhm, Hyuntae Kim, James Choi, Myungjoon Jang, Alexander Böhm, Stefan Fröhlich, Winfried Dölling
  • Publication number: 20120141670
    Abstract: Disclosed are an open-porous metal foam and a method for manufacturing the same. An open-porous metal foam according to an exemplary embodiment of the present invention is made of an iron-based alloy including 15 wt % or more of chrome and 5 wt % or more of aluminum. The open-porous metal foam is a semi-product that is formed of iron or the iron-based alloy that does not include chrome and aluminum or includes a smaller amount of chrome and aluminum in the powder when manufacturing, and the surface and the open pore thereof are uniformly coated with the powder of the iron-chrome-aluminum alloy and the organic binding agent. When heat treatment is performed under a reduction atmosphere, sintering is performed.
    Type: Application
    Filed: August 4, 2011
    Publication date: June 7, 2012
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V., ALANTUM
    Inventors: Gunnar WALTHER, Burghardt KLÖDEN, Juliane BÖHM, Tilo BÜTTNER, Thomas WEISSGÄRBER, Bernd KIEBACK, Arne BODEN, Hans-Dietrich BÖHM, Hyuntae KIM, James CHOI, Myungjoon JANG, Alexander BÖHM, Stefan FRÖHLICH, Winfried DÖLLING
  • Publication number: 20120087061
    Abstract: In accordance with an embodiment of the disclosure, a method of making a supercapacitor includes impregnating a foam electrode substrate with an active material precursor, wherein the foam electrode substrate includes a plurality of pores and the active material precursor is dispersed into the pores. The method further includes reacting the active material precursor infiltrated foam substrate with a reductant under conditions sufficient to convert the active material precursor to an active material, wherein the active material is based on a nitride, an oxynitride, a carbide, or an oxycarbide of a metal selected from Groups III, IV, V, VI, or VII of the Periodic Table.
    Type: Application
    Filed: October 12, 2011
    Publication date: April 12, 2012
    Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG e.V., THE REGENTS OF THE UNIVERSITY OF MICHIGAN
    Inventors: Levi T. Thompson, Paul Rasmussen, Gunnar Walther, Burghardt Kloeden
  • Patent number: 8012598
    Abstract: The invention relates to metal foam bodies having an open-porous structure as well as a method for producing thereof wherein according to the set task such metal foam bodies are to be provided which achieve an increased oxidation resistance and/or an increased corrosion resistance. With the metal foam bodies having an open-porous structure according to the invention, for such metal foam bodies within the webs of the open-porous structure there are channel shaped cavities formed as being determined by the production. At the same time, the webs and cavities will be provided with a metallic protective layer made of a material differing from the metallic starting material of the foam body or the channel shaped cavities will be filled with this material. For this, an adequate metal powder or an alloy component being included in the powder will be used which becomes liquid and forms a liquid phase respectively during thermal treatment below a temperature at which the metal of the base foam body is melting.
    Type: Grant
    Filed: March 8, 2005
    Date of Patent: September 6, 2011
    Assignees: Alantum Corporation, Fraunhofer Gesellschaft zur Forderung der angewandten Forschung E.V.
    Inventors: Dirk Naumann, Gunnar Walther, Alexander Böhm
  • Patent number: 7951246
    Abstract: The invention relates to open-pored metallic foam bodies as well as a method for manufacturing thereof. These metallic foam bodies are allowed to be advantageously used with ambient environmental conditions causing a high corrosion to many conventional materials, and accordingly reducing the lifetime thereof frequently. According to the set object, the metallic foam bodies should have a low mass simultaneously with a high specific surface, and increased corrosion resistance under chemically aggressive ambient environmental conditions. An open-pored metallic foam body according to the invention is then developed such that it is formed from a nickel-copper alloy having at least 40 percent by weight of nickel and yet a porosity of at least 90%.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: May 31, 2011
    Assignees: Alantum Corporation, Fraunhofer Gesellschaft zur Förderung der angewandten FORSCHUNG E.V.
    Inventors: Dirk Naumann, Lloyd Timberg, Alexander Böhm, Gunnar Walther
  • Publication number: 20080171218
    Abstract: The invention relates to metal foam bodies having an open-porous structure as well as a method for producing thereof wherein according to the set task such metal foam bodies are to be provided which achieve an increased oxidation resistance and/or an increased corrosion resistance. With the metal foam bodies having an open-porous structure according to the invention, for such metal foam bodies within the webs of the open-porous structure there are channel shaped cavities formed as being determined by the production. At the same time, the webs and cavities will be provided with a metallic protective layer made of a material differing from the metallic starting material of the foam body or the channel shaped cavities will be filled with this material. For this, an adequate metal powder or an alloy component being included in the powder will be used which becomes liquid and forms a liquid phase respectively during thermal treatment below a temperature at which the metal of the base foam body is melting.
    Type: Application
    Filed: March 8, 2005
    Publication date: July 17, 2008
    Applicants: INCO LIMITED, FRAUNHOFER-GESELLSCHAFT
    Inventors: Dirk Naumann, Gunnar Walther, Alexander Bohm
  • Publication number: 20080148940
    Abstract: The invention relates to a method for fabricating an open-porous metal foam body with a nickel base alloy, to a metal foam body fabricated this way as well as advantageous applications for the separation of specific components and pollutants from fluid flows. On the occasion, according to the set object open-porous metal foam bodies which have improved mechanical properties, and in addition an enlarged specific surface and/or increased surface roughness are to be provided. During fabricating it is proceeded such that an open-porous base foam body made of nickel or a nickel base alloy is coated with a liquid binding agent. Subsequent to this, a mixture of a powdery nickel base alloy and an organic component the temperature of phase transformation of which is at least 30 degrees centigrade from its solid phase to the liquid phase is deposited. The temperature should then be below the respective temperature of phase transformation.
    Type: Application
    Filed: February 24, 2006
    Publication date: June 26, 2008
    Applicant: CVRD INCO LIMITED
    Inventors: Alexander Bohm, Dirk Naumann, Tilo Buttner, Gunnar Walther, Shadi Saberi, Lloyd Timberg
  • Publication number: 20080118355
    Abstract: A turbine blade for turbo-engines as well as a method for manufacturing such a turbine blade is disclosed. According to the task set, the turbine blades should be capable of withstanding high thermal stress and able to maintain an adequate mechanical strength even at raised operating temperatures. The turbine blades are so designed that on the surface of a core element a heat-insulating layer of a metallic open-cell foam is integrally connected to said core element by sintering. The outer contour of the turbine blade is formed with at least one shell element. The shell element comprises a nickel-base alloy, which is also integrally connected by sintering to the open-cell foam which forms the heat-insulating layer.
    Type: Application
    Filed: January 13, 2006
    Publication date: May 22, 2008
    Applicants: CVRD INCO LIMITED, FRAUNHOFER-GESELLSCAHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Tilo Buttner, Gunnar Walther, Thomas Weissgarber, Michael Schutze, Dirk Naumann, Alexander Bohm
  • Publication number: 20080031767
    Abstract: The invention relates to open-pored metallic foam bodies as well as a method for manufacturing thereof. These metallic foam bodies are allowed to be advantageously used with ambient environmental conditions causing a high corrosion to many conventional materials, and accordingly reducing the lifetime thereof frequently. According to the set object, the metallic foam bodies should have a low mass simultaneously with a high specific surface, and increased corrosion resistance under chemically aggressive ambient environmental conditions. An open-pored metallic foam body according to the invention is then developed such that it is formed from a nickel-copper alloy having at least 40 percent by weight of nickel and yet a porosity of at least 90%.
    Type: Application
    Filed: June 23, 2005
    Publication date: February 7, 2008
    Applicants: INCO LIMITED, FRAUNHOFER-GESELLSCHAFT ZUR FORDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
    Inventors: Dirk Naumann, LLoyd Timberg, Alexander Bohm, Gunnar Walther