Patents Represented by Attorney Diderico van Eyl
  • Patent number: 6821314
    Abstract: An electrolyte capacitor containing a niobium anode, a niobium oxide barrier layer, a semiconducting cathode and an electrolyte is described, where the niobium oxide barrier comprises a least one metal from the group consisting of Al, Si, Ti, Zr, Mo, W, Y and Ta.
    Type: Grant
    Filed: May 7, 2002
    Date of Patent: November 23, 2004
    Assignee: H. C. Starck GmbH
    Inventors: Karlheinz Reichert, Oliver Thomas, Christoph Schnitter
  • Patent number: 6822053
    Abstract: The invention relates to a novel process that makes it possible to epoxidize &agr;,&bgr;-unsaturated enones or &agr;,&bgr;-unsaturated sulfones with high conversions and enantiomeric excesses in a two-phase system without addition of water in the presence of an organic solvent, a base, an oxidant, a diastereomer- and enantiomer-enriched homo-polyamino acid that has not been separately preactivated as catalyst, and a specific phase-transfer catalyst as cocatalyst.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: November 23, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Geller, Christa Maria Krüger, Hans-Christian Militzer
  • Patent number: 6818794
    Abstract: Process for extracting aqueous ketazine solutions which is carried out using an aqueous ketazine solution having a salt content of 5 to 27% by weight and an ammonia content of 0 to 28% by weight to extract at temperatures of 50 to 120° C., which is characterized in that the ketazine solution to be extracted has a molar excess of 50 to 200% of ketone based on the ketazine to be extracted, and that an aliphatic hydrocarbon extractant is used which has a boiling point of 150 to 300° C. at atmospheric pressure.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: November 16, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ottfried Schlak, Hans-Georg Adams, Johannes Kaulen
  • Patent number: 6818050
    Abstract: Paint and coating material system comprising a) at least one solids component comprising at least one organic or inorganic white, black or chromatic pigment, organic or inorganic fillers, or mixtures thereof, and b) at least one binder component, characterized in that the components of the system in water, with a specific energy input of less than 150 J/cm3, based on the sum of the volumes of the components and water, produced an aqueous dispersion having a particle size of <60 &mgr;m (determined in accordance with ISO 1524: 1983).
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: November 16, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventor: Peter-Roger Nyssen
  • Patent number: 6815562
    Abstract: The present invention relates to a process for the preparation of nitrodiphenylamines by reaction of nitrohalogens with anilines, a base and a catalyst, and to a process for the preparation of aminodiphenylamine by hydrogenation of the nitrodiphenylamine intermediately prepared.
    Type: Grant
    Filed: January 2, 2004
    Date of Patent: November 9, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Kunz, Joachim Haider, Dirk Ganzer, Ulrich Scholz, Adolf Sicheneder
  • Patent number: 6811195
    Abstract: A composite structural article, of preferably metal and thermoplastic material is described. The composite structural article comprises: (a) at least one reinforcing element (2) having sized openings (20); and (b) at least three profiled sections (1, 3, 4). A portion of each profiled section (1, 3, 4) is connected interlockingly with a portion of the reinforcing element (2). At least two of the profiled sections (1, 3, 4) have terminal portions each having a projecting region (5) that engages interlockingly with the sized openings (20) of the reinforcing element (2), such that a portion of the reinforcing element (2) surrounds at least partially the projecting regions (5). The profiled sections (1, 3, 4) are further joined to the reinforcing element (2) by means of thermoplastic material (11, 13) injected in the region of each interlocking connection with the reinforcing element (2).
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: November 2, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Klocke, Boris Koch
  • Patent number: 6809146
    Abstract: The present invention relates to rubber mixtures based on silica and carbon black-filled solution styrene/butadiene rubbers in which the silica has been partially replaced by rubber gels. The vulcanizates produced from the rubber mixtures of the present invention are distinguished by improved cushioning behavior at 0° C. and 60° C., and this is accompanied by better resistance to slipping when wet and improved rolling resistance. In addition, the vulcanizates have good resistance to wear. The processing behavior of the unvulcanized rubber mixtures (compound viscosity and Mooney relaxation) is not impaired by the partial substitution of silica.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: October 26, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Werner Obrecht, Anthony James Morgan Sumner
  • Patent number: 6806010
    Abstract: The invention relates to a toner containing low-silicon magnetite particles.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: October 19, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventor: Ulrich Meisen
  • Patent number: 6805816
    Abstract: The invention relates to a process for the preparation of &pgr;-conjugated polymers by (1) complexing a monomeric compound with a cyclodextrin, and (2) polymerizing the complexed compound using a chemical oxidant.
    Type: Grant
    Filed: November 16, 2001
    Date of Patent: October 19, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lambertus Groenendaal, Friedrich Jonas, Harald Pielartzik, Helmut Ritter, Joachim Storsberg
  • Patent number: 6802884
    Abstract: The allows: Ta—Si, Nb—Si, TaN—Si, NbN—Si and variants are used as enhanced powder anode substrates for electrolytic capacitor anodes (sintered powder masses) with dielectric oxide formation at walls of the internal pores.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: October 12, 2004
    Assignee: H.C. Starck, Inc.
    Inventors: Leah Simkins, Anastasia Conlon
  • Patent number: 6800396
    Abstract: A nickel hydroxide for rechargeable batteries which is provided with a cobalt hydroxide coating which is stable to oxidation is described. The stability to oxidation is achieved by covering the surface of the cobalt hydroxide layer with anions of weak inorganic oxygen acids.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: October 5, 2004
    Assignee: H. C. Starck GmbH
    Inventors: Viktor Stoller, Michael Erb, Armin Olbrich, Juliane Meese-Marktscheffel
  • Patent number: 6800780
    Abstract: Disclosed herein is a process for the preparation of carboxylic acid benzyl esters from dibenzyl ethers, comprising reacting dibenzyl ethers with carboxylic acids in the presence of a homogeneous acidic catalyst.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: October 5, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Pieter Ooms, Ursula Jansen, Bernd-Ulrich Schenke
  • Patent number: 6797670
    Abstract: The invention relates to microcapsules for which the walls comprise reaction products of polyisocyanates, guanidine compounds, and optionally amines, wherein the polyisocyanates have an isocyanurate content of at least 30% by weight, based on polyisocyanate, and the walls comprise on average less than 9% by weight, based on the total weight of the microcapsule.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: September 28, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Kleban, Günter Klug, Jürgen Weisser
  • Patent number: 6794549
    Abstract: The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene in the presence of phosphoric acid. The waste acid produced during the practice of the process is reconcentrated and recycled into the nitration reaction.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: September 21, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Demuth, Matthias Gotta, Thomas Linn, Hans-Martin Weber, Eberhard Zirngiebl
  • Patent number: 6790997
    Abstract: The invention relates to a process for the preparation of carbonyl compounds by the oxidation of alcohols in the presence of osmium compounds as catalysts in water or a solvent mixture containing water.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: September 14, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Eckert, Hans-Christian Militzer, Matthias Beller, Christian Döbler, Gerald Mehltretter, Uta Sundermeier
  • Patent number: 6787666
    Abstract: Described herein is a process for the preparation of 3,4-diaminobenzenesulphonic acid, characterized in that 1,2-diaminobenzene is reacted with anhydrous sulphuric acid which optionally comprises SO3 in up to stoichiometric amount, at a temperature in the range from 100 to 160° C. with stirring for a reaction time of from 1 to 20 hours; water or ice is added to the reaction mixture, optionally with cooling, up to a sulphuric acid concentration in the range from 30 to 75% by weight, based on the total mixture; the 3,4-diaminobenzenesulphonic acid precipitated out of the reaction mixture is filtered off, optionally washed with dilute sulphuric acid and worked up.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: September 7, 2004
    Assignee: Bayer Chemicals AG
    Inventors: Günter Rauchschwalbe, Herbert Emde, Wolfram Kissener
  • Patent number: 6786681
    Abstract: A method and an apparatus for the pneumatic conveying of fine bulk material, in particular glass fibers.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: September 7, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventor: Herbert Grasshoff
  • Patent number: 6777556
    Abstract: The present invention relates to a process for preparing 2-haloalkylnicotinic acids and haloalkylnicotinic acid derivatives starting from halomethyl-substituted enones and 3-dialkylaminoacrylic esters and also to intermediates of the process according to the invention.
    Type: Grant
    Filed: February 24, 2003
    Date of Patent: August 17, 2004
    Assignee: Bayer Chemicals AG
    Inventor: Peter Müller
  • Patent number: 6774239
    Abstract: This invention relates to the preparation of N,N′-carbonyldiazoles in a particularly advantageous manner by reacting corresponding azolide salts with phosgene in an aromatic compound or an ether as solvent. The azolide salts are preferably prepared by a novel process from an azole that is reacted with a compound of the formula M′R7 or MgR8Z′ in the presence of a solvent.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: August 10, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Johannes Scherer, Alexander Klausener, Robert Söllner
  • Patent number: 6770766
    Abstract: The invention relates to a novel process that makes it possible to epoxidize &agr;,&bgr;-unsaturated enones or &agr;,&bgr;-unsaturated sulfones with high conversions and enantiomeric excesses in the presence of a water-soluble base, an oxidant, a diastereomer- and enantiomer-enriched homo-polyamino acid as catalyst, water, an organic solvent that is immiscible or has only limited miscibility with water, and a specific phase-transfer catalyst as cocatalyst.
    Type: Grant
    Filed: July 24, 2002
    Date of Patent: August 3, 2004
    Assignee: Bayer Chemicals AG
    Inventors: Thomas Geller, Christa Maria Krüger, Hans-Christian Militzer