Patents by Inventor Michael Lennartz
Michael Lennartz 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: 8304362Abstract: The invention discloses core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) is about 5 to 20% of the diameter of the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt-based shell, reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.Type: GrantFiled: August 27, 2007Date of Patent: November 6, 2012Assignee: Umicore AG & Co. KGInventors: Marco Lopez, Michael Lennartz, Dan V. Goia, Carsten Becker, Stéphanie Chevalliot
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Patent number: 8288308Abstract: The invention discloses core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell?outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is ?20 nm. The thickness of the outer shell (tshell) comprises at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt-based shell, reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.Type: GrantFiled: June 9, 2010Date of Patent: October 16, 2012Assignee: Umicore AG & Co. KGInventors: Marco Lopez, Michael Lennartz, Dan V. Goia, Carsten Becker, Stephanie Chevalliot
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Patent number: 8227372Abstract: The invention is directed to core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, 5 preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) is about 5 to 20% of the diameter of the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The inner particle core (Mcore) of the particles comprises metal or ceramic materials, whereas the material of the outer shell (Mshell) comprises precious metals and/or alloys thereof. The core/shell type catalyst particles are preferably supported on suitable support materials such as carbon black and can be used as electrocatalysts for fuel cells and for other catalytic applications.Type: GrantFiled: August 27, 2007Date of Patent: July 24, 2012Assignee: Umicore AG & Co. KGInventors: Marco Lopez, Michael Lennartz, Dan V. Goia, Carsten Becker, Stéphanie Chevalliot
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Patent number: 8101731Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper. The dyes are of formula (14), (15) or (16) in which R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H, R2 represents SO3H or CO2H, R3 represents hydrogen, C1-C4alkyl, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl, R3a represents hydrogen or NH2 and A1 and A2, independently of the other, is selected from the group consisting of an acetoacetylated amine, a derivative of barbituric acid, a 2,4,6-triaminopyrimidine derivative, a pyridone derivative, an aminopyrazole or a pyrazolone derivative and a benzoic acid derivative, or A1 and A2, each one independently of the other, represent a certain phenol residue.Type: GrantFiled: March 29, 2010Date of Patent: January 24, 2012Inventors: Michael Lennartz, Adolf Käser, Sandra Weiss
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Patent number: 8012221Abstract: The invention relates to a process for the surface coloration of paper characterized in that, in a first step, the paper surface is treated with a water soluble dye and, subsequently, in a second step, the paper surface is treated with a fixing agent.Type: GrantFiled: November 1, 2006Date of Patent: September 6, 2011Assignee: BASF SEInventors: Charles Hunger, Michael Lennartz
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Publication number: 20110086295Abstract: The invention discloses core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is ?20 nm. The thickness of the outer shell (tshell) comprises at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt-based shell, reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.Type: ApplicationFiled: June 9, 2010Publication date: April 14, 2011Applicant: UMICORE AG & CO. KGInventors: Marco LOPEZ, Michael LENNARTZ, Dan V. GOIA, Carsten BECKER, Stephanie CHEVALLIOT
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Publication number: 20100285324Abstract: The invention relates to a composition for surface colouration of paper web comprising a) from 0.1 to 30% by weight, based on the total weight of the composition, of a colouring pigment, b) from 0.1 to 20% by weight, based on the total weight of the composition of a starch/latex copolymer, characterized in that, in addition to starch, the monomeric components that are copolymerized comprise i) styrene or a substituted styrene, ii) an acrylate and/or methacrylate and, optionally, iii) one or more further ethylenically unsaturated monomers, c) from 0 to 20% by weight, based on the total weight of the composition, of starch or a starch derivative, d) from 0 to 10% by weight, based on the total weight of the composition of one or more auxiliaries and e) water to complete to 100% by weight, based on the total weight of the composition.Type: ApplicationFiled: January 17, 2007Publication date: November 11, 2010Inventors: Michael Lennartz, Charles Hunger, Asko Olavi Karppi
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Publication number: 20100199443Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper. The dyes are of formula (14), (15) or (16) in which R1 represents hydrogen, C1-C4alkyl, C1-C4alkoxy or SO3H, R2 represents SO3H or CO2H, R3 represents hydrogen, C1-C4alkyl, halogen, hydroxy, C1-C4alkoxy, carboxy, NH2 or NHC1-C4alkyl, R3a represents hydrogen or NH2 and A1 and A2, independently of the other, is selected from the group consisting of an acetoacetylated amine, a derivative of barbituric acid, a 2,4,6-triaminopyrimidine derivative, a pyridone derivative, an aminopyrazole or a pyrazolone derivative and a benzoic acid derivative, or A1 and A2, each one independently of the other, represent a certain phenol residue.Type: ApplicationFiled: March 29, 2010Publication date: August 12, 2010Inventors: Michael Lennartz, Adolf Kåser, Sandra Weiss
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Patent number: 7723494Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.Type: GrantFiled: January 4, 2008Date of Patent: May 25, 2010Assignee: Ciba Specialty Chemicals CorporationInventors: Michael Lennartz, Adolf Käser, Sandra Weiss
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Publication number: 20100092841Abstract: The invention is directed to core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, 5 preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) is about 5 to 20% of the diamet the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The inner particle core (Mcore) of the particles comprises metal or ceramic materials, whereas the material of the outer shell (Mshell) comprises precious metals and/or alloys thereof. The core/shell type catalyst particles are preferably supported on suitable support materials such as carbon black and can be used as electrocatalysts for fuel cells and for other catalytic applications.Type: ApplicationFiled: August 27, 2007Publication date: April 15, 2010Applicant: UMICORE AG & CO. KGInventors: Marco Lopez, Michael Lennartz, Dan V. Goia, Carsten Becker, Stephanie Chevalliot
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Publication number: 20100086832Abstract: The invention discloses core/shell type catalyst particles comprising a Mcore/Mshell structure with Mcore=inner particle core and Mshell=outer particle shell, wherein the medium diameter of the catalyst particle (dcore+shell) is in the range of 20 to 100 nm, preferably in the range of 20 to 50 nm. The thickness of the outer shell (tshell) is about 5 to 20% of the diameter of the inner particle core of said catalyst particle, preferably comprising at least 3 atomic layers. The core/shell type catalyst particles, particularly the particles comprising a Pt-based shell, reveal a high specific activity. The catalyst particles are preferably supported on suitable support materials such as carbon black and are used as electrocatalysts for fuel cells.Type: ApplicationFiled: August 27, 2007Publication date: April 8, 2010Applicant: UMICORE AG & CO. KGInventors: Marco Lopez, Michael Lennartz, Dan V. Goia, Carsten Becker, Stephanie Chevalliot
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Publication number: 20090053583Abstract: The invention describes a process for producing a gas diffusion electrode which has a catalyst layer having a smooth surface, wherein the smooth surface of the catalyst layer is produced by bringing the catalyst layer in the moist state into contact with a transfer film and removing this transfer film after drying. In variant A, the catalyst layer is firstly produced on a transfer film and then transferred in the moist state to the gas diffusion layer. In variant B, the catalyst layer is applied to the gas diffusion layer, and a transfer film is then placed on top. In both cases, the structure produced in this way is subsequently dried. Before further processing, the transfer film is removed to give a gas diffusion electrode having a smooth catalyst surface which has a maximum profile peak height (Rp) of less than 25 microns. The electrodes are used for producing membrane-electrode assemblies for membrane fuel cells or other electrochemical devices.Type: ApplicationFiled: January 11, 2006Publication date: February 26, 2009Applicant: UMICORE AG & CO KGInventors: Matthias Binder, Joachim Koehler, Sandra Wittpahl, Claus-Rupert Hohenthanner, Michael Lennartz
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Publication number: 20090044349Abstract: The invention relates to a process for surface colouration of paper web by application of the dye grafted binder to the paper surface, followed by treatment of the dyed substrate with a fixing agent, in addition to certain water soluble or ready to use aqueous dispersions of a reactive dye grafted binders, a process for the preparation thereof and use thereof in the paper surface colouration process.Type: ApplicationFiled: December 28, 2006Publication date: February 19, 2009Inventors: Michael Lennartz, Charles Hunger
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Publication number: 20080119643Abstract: The present invention provides 4,4?-diazobenzanilide derivatives, a process for their preparation, their use as dyes, dyed paper, formulations comprising them and also precursors thereof and their processes of preparation.Type: ApplicationFiled: October 10, 2005Publication date: May 22, 2008Inventors: Michael Lennartz, Holger Lautenbach
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Publication number: 20080114158Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates necessary for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.Type: ApplicationFiled: January 4, 2008Publication date: May 15, 2008Inventors: Michael Lennartz, Adolf Kaser, Sandra Weiss
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Patent number: 7351808Abstract: Anionic monoazo dyes of the formula (1) in which A represents 1- or 2-naphthyl residue, which is substituted by a total of one or two sulphonic and/or carboxylic acid groups.Type: GrantFiled: July 17, 2003Date of Patent: April 1, 2008Assignee: Ciba Specialty Chemicals CorporationInventors: Michael Lennartz, Sandra Weiss
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Patent number: 7341607Abstract: The present invention relates to novel yellow anionic dyes, a process for their preparation, certain novel intermediates for their preparation and the use of these dyes for dyeing natural or synthetic materials, in particular, paper.Type: GrantFiled: May 27, 2003Date of Patent: March 11, 2008Assignee: Ciba Specialty Chemicals Corp.Inventors: Michael Lennartz, Adolf Käser, Sandra Weiss
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Publication number: 20060168887Abstract: The invention relates to a process and an apparatus for producing hydrogen-containing fuel gases for fuel cells by catalytic reforming of hydrocarbons and subsequent gas purification. The process is characterized in that the catalytic reforming comprises two successive stages of which the first stage comprises autothermal reforming and the second stage comprises low-temperature steam reforming at temperatures below 650° C. In the first stage (autothermal reforming, ATR stage), a feed mixture of hydrocarbons, oxygen and water or water vapour is reacted over a catalyst in an autothermal reforming reaction to convert it incompletely into a hydrogen-rich gas mixture. The mixture which still contains residual amounts of hydrocarbons is then reacted in a subsequent steam reforming stage (second stage, SR stage) to give a hydrogen-rich fuel gas. A fuel gas which has a temperature at the reactor outlet of 400-650° C. and contains a very high proportion of hydrogen is obtained.Type: ApplicationFiled: October 18, 2003Publication date: August 3, 2006Inventors: Frank Baumann, Matthias Duisberg, Michael Lennartz
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Patent number: 7066969Abstract: The present invention relates to novel compounds of the formulae A, D1, D2, R1 and n are as defined in the description the compounds being in an internal or external salt form, or mixtures of compounds (1) and (2), a process for their preparation and preparations containing them used for dyeing paper.Type: GrantFiled: July 11, 2002Date of Patent: June 27, 2006Assignee: Ciba Specialty Chemicals CorporationInventors: Michael Lennartz, Dölf Käser, Sandra Weiss
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Publication number: 20050256305Abstract: Anionic monoazo dyes of the formula (1) in which A represents 1- or 2-naphthyl residue, which is substituted by a total of one or two sulphonic and/or carboxylic acid groups.Type: ApplicationFiled: July 17, 2003Publication date: November 17, 2005Inventors: Michael Lennartz, Sandra Weiss