Patents by Inventor Daniel Rudhardt
Daniel Rudhardt 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: 9868875Abstract: A preferably aqueous dispersion comprises carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25. In a process for preparing a dispersion of this kind, carbon nanotubes and graphene platelets are combined so that the ratio by mass of carbon nanotubes to graphene platelets in the dispersion is in a range from ?5:95 to ?75:25. The dispersion can be used as a printing ink for producing electrically conductive films. The invention further provides an electrically conductive film comprising carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25.Type: GrantFiled: August 20, 2012Date of Patent: January 16, 2018Assignee: FUTURECARBON GMBHInventors: Daniel Rudhardt, Thomas Buesgen, Stefanie Eiden, Diana Dimowa Landen, Gesa Behnken
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Patent number: 9587133Abstract: A preferably aqueous dispersion comprises carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25. In a process for preparing a dispersion of this kind, carbon nanotubes and graphene platelets are combined so that the ratio by mass of carbon nanotubes to graphene platelets in the dispersion is in a range from ?5:95 to ?75:25. The dispersion can be used as a printing ink for producing electrically conductive films. The invention further provides an electrically conductive film comprising carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25.Type: GrantFiled: August 20, 2012Date of Patent: March 7, 2017Assignee: FUTURECARBON GMBHInventors: Daniel Rudhardt, Thomas Buesgen, Stefanie Eiden, Diana Dimowa Landen, Gesa Behnken
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Patent number: 9540524Abstract: Process for the preparation of stable suspensions and dispersions of carbon nanotubes, and dispersions prepared by the process.Type: GrantFiled: October 4, 2011Date of Patent: January 10, 2017Assignee: COVESTRO DEUTSCHLAND AGInventors: Daniel Rudhardt, Stefanie Eiden, Sigrun Stein, Gertrud Ott
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Publication number: 20150037550Abstract: The present invention relates to a silver-containing aqueous ink formulation for production of electrically conductive structures, wherein the formulation is provided in the form of a two-component system composed of a vehicle component A at least comprising an organic solvent, additives and water, and a silver nanoparticle sol as component B, at least comprising a liquid dispersant, stabilized silver nanoparticles and an electrostatic dispersion stabilizer, and the formulation composed of components A and B comprises at least a) 1-50% by weight of organic solvent, b) 0.005-12% by weight of additives, and c) 40-70% by weight of water, and d) 15-50% by weight of electrostatically stabilized silver nanoparticles, where the sum of the total proportions in the ink formulation adds up to 100% by weight in each case.Type: ApplicationFiled: June 13, 2012Publication date: February 5, 2015Applicant: BAYER TECHNOLOGY SERVICES GMBHInventors: Venkataramanan Balasubramaniam, Daniel Rudhardt, Frank Sicking, Stefanie Eiden
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Publication number: 20140329054Abstract: The present invention relates to an aqueous formulation particularly for generating electrically conductive and/or reflective structures by microcontact printing, characterized in that the formulation contains at least a) ?15 to ?55 parts by weight water, b) ?10 to ?50 parts by weight alcohol, c) ?15 to ?45 parts by weight metal-based nanoparticles, d) 0.5 to ?10 parts by weight non-fluorinated surfactant, and e) ?0.5 to ?10 parts by weight fluorinated surfactant, wherein the above defined constituents a) to e) summarize to a concentration of ?100 parts by weight in the formulation. The wetting behavior especially of hydrophobic materials may significantly be improved. The present invention further relates to a method of generating structures, particularly being electrically conductive and/or reflective, on a substrate by microcontact printing and a substrate comprising such a structure.Type: ApplicationFiled: September 25, 2012Publication date: November 6, 2014Applicant: CLARIANT INTERNATIONAL AGInventors: Deivaraj Theivanayagam Chairman, Frank Sicking, Venkataramanan Balasubramanian, Daniel Rudhardt
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Publication number: 20140319431Abstract: An electrically conductive printable composition comprises silver particles, a dispersing agent, a solvent, a first surfactant, comprising a hydrocarbon based surfactant, and a second surfactant, comprising a fluoro-based surfactant.Type: ApplicationFiled: June 13, 2012Publication date: October 30, 2014Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Daniel Rudhardt, Frank Sicking, Stefanie Eiden, Venkataramanan Balasubramaniam, Stefan Bahnmuller, Rachel Tessy Mathew, Fransiska Cecilia Kartawidjaja
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Publication number: 20140299821Abstract: The invention relates to a method for producing a metal nanoparticle dispersion, in particular a silver nanoparticle dispersion, wherein after the production of nanoscale metal particles, stabilized by means of at least one auxiliary dispersing agent containing at least one free carboxylic acid group or salt thereof as a functional group, in at least one liquid dispersant (solvent), flocculation of the metal nanoparticles is deliberately caused, the formed metal nanoparticle flocculation is dispersed again in at least one liquid dispersant, optionally by adding a base, and the metal nanoparticle dispersion is set to a desired metal nanoparticle concentration. The invention further relates to a metal nanoparticle dispersion, in particular a silver nanoparticle dispersion, in particular produced by means of the method according to the invention, and to the use of said metal nanoparticle dispersion.Type: ApplicationFiled: October 30, 2012Publication date: October 9, 2014Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Daniel Rudhardt, Bibin Thomas Anto, Chaiman Deivaraj Thelvanayagam, Fransiska Cecilia Kartawidiala, Stefan Bahnmuller
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Patent number: 8834960Abstract: The present invention relates to a process which comprises: providing a substrate having a surface; applying a dispersion to the surface, wherein the dispersion comprises at least one liquid dispersant, and electrostatically stabilized silver nanoparticles having a zeta potential of from ?20 to ?55 mV in the dispersant at a pH value of from 2 to 10; and heating one or both of the surface and the dispersion applied thereon to a temperature of from 50° C. below the boiling point of the dispersant to 150° C. above the boiling point of the dispersant, to form a conductive coating on the surface.Type: GrantFiled: March 9, 2011Date of Patent: September 16, 2014Assignee: Bayer Intellectual Property GmbHInventors: Daniel Rudhardt, Stefanie Eiden, Dirk Storch, Elsa Karoline Schädlich, Sven Sommerfeld
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Publication number: 20140212656Abstract: A preferably aqueous dispersion comprises carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25. In a process for preparing a dispersion of this kind, carbon nanotubes and graphene platelets are combined so that the ratio by mass of carbon nanotubes to graphene platelets in the dispersion is in a range from ?5:95 to ?75:25. The dispersion can be used as a printing ink for producing electrically conductive films. The invention further provides an electrically conductive film comprising carbon nanotubes and graphene platelets, with the ratio by mass of carbon nanotubes to graphene platelets being situated within a range from ?5:95 to ?75:25.Type: ApplicationFiled: August 20, 2012Publication date: July 31, 2014Inventors: Daniel Rudhardt, Thomas Buesgen, Stefanie Eiden, Diana Dimowa Landen, Gesa Behnken
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Publication number: 20130337158Abstract: The present invention relates to a process for producing a Pickering emulsion comprising water, a solvent not miscible with water, and also, preferably sterically, stabilized silver nanoparticles, for producing conductive coatings. The invention further relates to a process for coating all or part of the area of surfaces, in particular with a Pickering emulsion according to the invention, where the resultant coating in particular has high electrical conductivity and advantageously can also be transparent.Type: ApplicationFiled: December 19, 2011Publication date: December 19, 2013Applicant: BAYER INTELLECTUAL PROPERTY GMBHInventors: Stefanie Eiden, Diana Dimova Landen, Daniel Gordon Duff, Daniel Rudhardt
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Publication number: 20130200310Abstract: Process for the preparation of stable suspensions and dispersions of carbon nanotubes, and dispersions prepared by the process.Type: ApplicationFiled: October 4, 2011Publication date: August 8, 2013Applicant: BAYER MATERIALSCIENCE AGInventors: Daniel Rudhardt, Stefanie Eiden, Sigrun Stein, Gertrud Ott
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Patent number: 8197835Abstract: The present invention relates to biomedical foam articles for the wound sector which are formed by spraying a polymeric dispersion onto a wound. The polymeric dispersion being sprayed onto a wound surface forms a three-dimensional body which conforms to the spatial shape of the wound and which, as well as covering the wound surface, ensures a complete and accurately fitted packing of the wound in the depth dimension as well as the other dimensions. The biomedical foam articles of the present invention are particularly useful for treating chronic wounds.Type: GrantFiled: April 5, 2007Date of Patent: June 12, 2012Assignees: Bayer Innovation GmbH, Bayer Materialscience AGInventors: Melita Dietze, Burkhard Fugmann, Michael Mager, Thorsten Rische, Michael Heckes, Daniel Rudhardt, Rolf Gertzmann
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Publication number: 20110256383Abstract: A polymer material according to the invention comprises a polymer and silver nanoparticles dispersed in the polymer. The silver nanoparticles may be obtained by reducing a silver salt in a dispersing agent in the presence of a dispersion stabilizer with a reducing agent, the dispersion stabilizer being selected from the group consisting of carboxylic acids having ?1 to ?6 carbon atoms, salts of carboxylic acids having ?1 to ?6 carbon atoms, sulfates and phosphates. Such a material is particularly suitable for use as an electrode.Type: ApplicationFiled: March 28, 2011Publication date: October 20, 2011Applicant: Bayer MaterialScience AGInventors: Ayse Cochet, Joachim Wagner, Werner Jenninger, Daniel Rudhardt, Stefanie Eiden
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Publication number: 20110223322Abstract: The present invention relates to a process which comprises: providing a substrate having a surface; applying a dispersion to the surface, wherein the dispersion comprises at least one liquid dispersant, and electrostatically stabilised silver nanoparticles having a zeta potential of from ?20 to ?55 mV in the dispersant at a pH value of from 2 to 10; and heating one or both of the surface and the dispersion applied thereon to a temperature of from 50° C. below the boiling point of the dispersant to 150° C. above the boiling point of the dispersant, to form a conductive coating on the surface.Type: ApplicationFiled: March 9, 2011Publication date: September 15, 2011Applicant: Bayer MaterialScience AGInventors: Daniel Rudhardt, Stefanie Eiden, Dirk Storch, Elsa Karoline Schädlich, Sven Sommerfeld
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Publication number: 20110009268Abstract: The novel process for coacervating iodopropargyl compounds affords stable aqueous dispersions of coacervated iodopropargyl compounds which, optionally in a mixture with further active biocidal ingredients, can be used very effectively to protect technical materials.Type: ApplicationFiled: January 23, 2008Publication date: January 13, 2011Inventors: Hermann Uhr, Daniel Rudhardt, Frank Ridder, Johan Kijstra, Sascha Plug
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Publication number: 20090269411Abstract: Taste-masked powders that can be inhaled or administered orally, a simple method for the production thereof, and the use thereof for applying biologically active substances.Type: ApplicationFiled: December 20, 2006Publication date: October 29, 2009Applicant: Bayer Technology Services GmbHInventors: Rainer Bellinghausen, Daniel Rudhardt, Frank Ridder, Martin Steinbeck, Jesko Zank, Martin Weiss, Olaf Behrend, Udo Van Stiphout
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Publication number: 20090263431Abstract: The invention relates to a process for producing polyurethane foams for wound management wherein a composition containing a polyurethane dispersion and specific coagulants is frothed and dried.Type: ApplicationFiled: October 2, 2008Publication date: October 22, 2009Applicant: BAYER INNOVATION GMBHInventors: Burkhard Fugmann, Melita Dietze, Thorsten Rische, Michael Mager, Michael Heckes, Daniel Rudhardt, Rolf Gertzmann, Jan Schonberger, Sebastian Dorr
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Publication number: 20090169486Abstract: The present invention relates to biomedical foam articles for the wound sector which are formed by spraying a polymeric dispersion onto a wound. The polymeric dispersion being sprayed onto a wound surface forms a three-dimensional body which conforms to the spatial shape of the wound and which, as well as covering the wound surface, ensures a complete and accurately fitted packing of the wound in the depth dimension as well as the other dimensions. The biomedical foam articles of the present invention are particularly useful for treating chronic wounds.Type: ApplicationFiled: April 5, 2007Publication date: July 2, 2009Applicant: Bayer Business Services GmbHInventors: Melita Dietze, Burkhard Fugmann, Michael Mager, Thorsten Rische, Michael Heckes, Daniel Rudhardt, Rolf Gertzmann
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Publication number: 20090170705Abstract: Novel seed dressing agent formulations comprising of—at least one active agrochemical ingredient for the dressing of seeds, —a dispersion of biologically degradable polyester-polyurethane-polyureas in water whereby the solid content thereof is between 30 and 50 weight %. Said formulation also comprises additives. The invention also relates to a method for the production of a novel seed dressing agent formulation and the utilization thereof for the dressing of seeds.Type: ApplicationFiled: January 12, 2007Publication date: July 2, 2009Applicant: Bayer Technology Services GmbHInventors: Arno Nennemann, Johan Kijlstra, Daniel Rudhardt, Frank Sicking
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Publication number: 20090148395Abstract: The present invention relates to biomedical foam articles for the wound sector which are formed by spraying a polymeric dispersion onto a wound. The polymeric dispersion being sprayed onto a wound surface forms a three-dimensional body which conforms to the spatial shape of the wound and which, as well as covering the wound surface, ensures a complete and accurately fitted packing of the wound in the depth dimension as well as the other dimensions. The biomedical foam articles of the present invention are particularly useful for treating chronic wounds.Type: ApplicationFiled: October 2, 2008Publication date: June 11, 2009Applicant: BAYER INNOVATION GMBHInventors: Burkhard Fugmann, Melita Dietze, Michael Mager, Thorsten Rische, Michael Heckes, Daniel Rudhardt, Rolf Gertzmann, Jan Schonberger, Sebastian Dorr