Patents by Inventor Stefan Schumann
Stefan Schumann 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).
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Patent number: 12454459Abstract: A process can be used for the functionalization of graphene material by mixing graphene material with at least one silane. The functionalized graphene material is useful, for example, in thermoplastics.Type: GrantFiled: June 15, 2021Date of Patent: October 28, 2025Assignee: Evonik Operations GmbHInventors: Valeri Leich, Jonas Hönig, Julian Teichmann, Silvia Blank-Shim, Stefan Schumann, Verena Breuers, Patrik Stenner
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Publication number: 20240351883Abstract: A polyalkylene oxide having at least one aromatic radical is a dispersant for a graphene material. A process for dispersing graphene material is developed where the abovementioned polyalkylene oxides are employed as the dispersant. Compositions including the abovementioned dispersant and graphene material are produced.Type: ApplicationFiled: June 29, 2022Publication date: October 24, 2024Applicant: Evonik Operations GmbHInventors: Kathrin LEHMANN, Stefan Schumann, Valeri Leich, Verena Breuers, Jonas Hönig, Lea Muchajer, Thorsten Hoven, Peter Seidensticker
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Publication number: 20240301147Abstract: A process can be used for production of trans-polyoctenamer-graphene composite material having a high filler content, from a trans-polyoctenamer and graphene material. The highly filled trans-polyoctenamer-graphene composite material is useful, for example, in the automotive sector, in heat exchangers, in housings, encapsulations, plain bearings, in 3-D printing heads for heat removal, injection moulded parts, electronics applications, hose systems, membranes, fuel cells, cable systems, indoor and sports apparel, EM protection, and orthopaedics.Type: ApplicationFiled: December 23, 2021Publication date: September 12, 2024Applicant: EVONIK OPERATIONS GMBHInventors: Valeri LEICH, Alexander Paasche, Stefan Schumann, Dorothea Spannenkrebs, Alexey Merkulov, Verena Breuers, Christian Däschlein, Uwe Paulmann, Jonas Hönig
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Publication number: 20230264961Abstract: A process can be used for the functionalization of graphene material by mixing graphene material with at least one silane. The functionalized graphene material is useful, for example, in thermoplastics.Type: ApplicationFiled: June 15, 2021Publication date: August 24, 2023Applicant: Evonik Operations GmbHInventors: Valeri Leich, Jonas Hönig, Julian Teichmann, Silvia Blank-Shim, Stefan Schumann, Verena Breuers, Patrik Stenner
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Publication number: 20220240808Abstract: An electrochemical method and an electrochemical sensor for breath analysis of single or multiple analytes using a porous, preferably flexible and disposable supporting material is provided, a salt is incorporated, and which can be wetted in contact with the exhaled breath condensate. The electrochemical method acting simultaneously as sampling method, as an electrolyte and as a support for the electrode structures. In some embodiments the salt may be hygroscopic, such that the porous substrate stays wet. To ensure that the obtained signal originates from the analyte, the electrochemical sensor preferably exhibits a differential electrode design, including a sensing (analyte-sensitive) and a blank (analyte-insensitive) electrode in order to isolate and remove the background signals.Type: ApplicationFiled: May 20, 2020Publication date: August 4, 2022Applicants: Albert-Ludwigs-Universitat Freiburg, Imperial College LondonInventors: Can Dincer, Elmar Laubender, Daniela Maier, Stefan Schumann, Gerald Urban, Firat Guder
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Patent number: 10748714Abstract: The present invention relates to a process for the production of a layered body (1), at least comprising the process steps: I) provision of a photoactive layer comprising a material having a perovskite type crystal structure; II) superimposing the photoactive layer at least partially with a coating composition A) comprising an electrically conductive polymer a) and an organic solvent b); III) at least partial removal of the organic solvent b) from the coating composition A) superimposed in process step II), thereby obtaining an electrically conductive layer superimposed on the photoactive layer. The present invention also relates to a layered body obtainable by this process, to dispersions, to an electronic device, to a process for the preparation of a photovoltaic device and to the photovoltaic device that is obtainable by this process.Type: GrantFiled: September 16, 2019Date of Patent: August 18, 2020Assignee: HERAEUS DEUTSCHLAND GMBH & CO. KGInventors: Stefan Schumann, Andreas Elschner, Armin Sautter, Wilfried Lövenich, Rüdiger Sauer, Jan Sütterlin, Nina Kausch-Busies
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Publication number: 20200013559Abstract: The present invention relates to a process for the production of a layered body (1), at least comprising the process steps: I) provision of a photoactive layer comprising a material having a perovskite type crystal structure; II) superimposing the photoactive layer at least partially with a coating composition A) comprising an electrically conductive polymer a) and an organic solvent b); III) at least partial removal of the organic solvent b) from the coating composition A) superimposed in process step II), thereby obtaining an electrically conductive layer superimposed on the photoactive layer. The present invention also relates to a layered body obtainable by this process, to dispersions, to an electronic device, to a process for the preparation of a photovoltaic device and to the photovoltaic device that is obtainable by this process.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Inventors: Stefan Schumann, Andreas Elschner, Armin Sautter, Wilfried Lövenich, Rüdiger Sauer, Jan Sütterlin, Nina Kausch-Busies
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Patent number: 10468198Abstract: The present invention relates to a process for the production of a layered body (1), at least comprising the process steps: I) provision of a photoactive layer comprising a material having a perovskite type crystal structure; II) superimposing the photoactive layer at least partially with a coating composition A) comprising an electrically conductive polymer a) and an organic solvent b); III) at least partial removal of the organic solvent b) from the coating composition A) superimposed in process step II), thereby obtaining an electrically conductive layer superimposed on the photoactive layer. The present invention also relates to a layered body obtainable by this process, to dispersions, to an electronic device, to a process for the preparation of a photovoltaic device and to the photovoltaic device that is obtainable by this process.Type: GrantFiled: November 17, 2015Date of Patent: November 5, 2019Assignee: HERAEUS DEUTSCHLAND GMBH & CO. KGInventors: Stefan Schumann, Andreas Elschner, Armin Sautter, Wilfried Lovenich, Rüdiger Sauer, Jan Sütterlin, Nina Kausch-Busies
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Patent number: 10283715Abstract: The present invention relates to a composition comprising: a) at least one organic solvent; b) at least one conductive polymer, preferably a cationic polymer; c) at least one fluorinated compound; d) at least one polymeric anion, wherein the at least one polymeric anion is a copolymer comprising ionic and non-ionic repeating units. The present invention also relates to a layered structure comprising the composition, to a process for the production of the composition, to a process for the production of the layered structure and to devices comprising the layered structure as well as to the use of the composition in devices to achieve a prolongation of lifetime.Type: GrantFiled: March 9, 2016Date of Patent: May 7, 2019Assignee: HERAEUS DEUTSCHLAND GMBH & CO. KGInventors: Stefan Schumann, Nina Kausch-Busies, Wilfried Lövenich, Jan Sütterlin, Andreas Elschner, Arnulf Scheel
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Publication number: 20180182965Abstract: The present invention relates to a composition comprising: a) at least one organic solvent; b) at least one conductive polymer, preferably a cationic polymer; c) at least one fluorinated compound; d) at least one polymeric anion, wherein the at least one polymeric anion is a copolymer comprising ionic and non-ionic repeating units. The present invention also relates to a layered structure comprising the composition, to a process for the production of the composition, to a process for the production of the layered structure and to devices comprising the layered structure as well as to the use of the composition in devices to achieve a prolongation of lifetime.Type: ApplicationFiled: March 9, 2016Publication date: June 28, 2018Inventors: Stefan Schumann, Nina Kausch-Busies, Wilfried Lövenich, Jan Sütterlin, Andreas Elschner, Arnulf Scheel
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Publication number: 20170365418Abstract: The present invention relates to a process for the production of a layered body (1), at least comprising the process steps: I) provision of a photoactive layer comprising a material having a perovskite type crystal structure; II) superimposing the photoactive layer at least partially with a coating composition A) comprising an electrically conductive polymer a) and an organic solvent b); III) at least partial removal of the organic solvent b) from the coating composition A) superimposed in process step II), thereby obtaining an electrically conductive layer superimposed on the photoactive layer. The present invention also relates to a layered body obtainable by this process, to dispersions, to an electronic device, to a process for the preparation of a photovoltaic device and to the photovoltaic device that is obtainable by this process.Type: ApplicationFiled: November 17, 2015Publication date: December 21, 2017Inventors: Stefan Schumann, Andreas Elschner, Armin Sautter, Wilfried Lövenich, Rüdiger Sauer, Jan Seuring, Nina Kausch-Busies
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Publication number: 20160056397Abstract: Described is a process for the preparation of a layered body, the process comprising the steps: I) providing a photoactive layer; II) superimposing the photoactive layer with a coating composition comprising a) an electrically conductive polymer, b) an organic solvent; and III) at least partially removing the organic solvent b) from the composition obtaining an electrically conductive layer superimposing the photoactive layer. Also described is a layered body obtained by this process, a layered body, an organic photovoltaic cell, a solar cell module, a composition, and the use of a composition.Type: ApplicationFiled: March 27, 2014Publication date: February 25, 2016Inventors: Stefan SCHUMANN, Andreas ELSCHNER, Detlef GAISER, Wilfried LÖVENICH, Daniel VOIGHT
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Patent number: 7369059Abstract: An electrical power distribution device such as a junction box or the like includes a status indicator that also serves not only to indicate the status of energization of a connector mounted in a first housing opening, but also to illuminate a translucent indicia-bearing plate mounted in second housing opening. The housing contains a chamber in which are mounted a light emitting diode that is energized simultaneously with the connector, and a light transmitting member that directs the light produced by the LED toward the second housing opening.Type: GrantFiled: December 2, 2005Date of Patent: May 6, 2008Assignee: Weidmüller Interface GmbH & Co. KGInventors: Andreas Hoffmann, Andreas Muhs, Hermann Krause, Jürgen Ziemke, Klaus Püschner, Michael Schnatwinkel, Ralf Schumacher, Stefan Reker, Stefan Schumann, Ulrike Klasing
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Publication number: 20070040698Abstract: An electrical power distribution device such as a junction box or the like includes a status indicator that also serves not only to indicate the status of energization of a connector mounted in a first housing opening, but also to illuminate a translucent indicia-bearing plate mounted in second housing opening. The housing contains a chamber in which are mounted a light emitting diode that is energized simultaneously with the connector, and a light transmitting member that directs the light produced by the LED toward the second housing opening.Type: ApplicationFiled: December 2, 2005Publication date: February 22, 2007Inventors: Andreas Hoffmann, Andreas Muhs, Hermann Krause, Jurgen Ziemke, Klaus Puschner, Michael Schnatwinkel, Ralf Schumacher, Stefan Reker, Stefan Schumann, Ulrike Klasing