Patents Represented by Attorney Diderico van Eyl
  • Patent number: 6888005
    Abstract: A process for the preparation of 2-phenylbenzimidazole-5-sulphonic acid, characterized in that 3,4-diaminobenzenesulphonic acid is reacted at a pH between 4 and 7 in aqueous solution with 0.9 to 1.5 mol of benzaldehyde per mole of 3,4-diaminobenzenesulphonic acid and with 1.0 to 3.0 mol of SO2 per mole of 3,4-diaminobenzenesulphonic acid, or an agent which comprises 1.0 to 3.0 mol of SO2 per mole of 3.4-diaminobenzenesulphonic acid, is described.
    Type: Grant
    Filed: September 16, 2003
    Date of Patent: May 3, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Rauchschwalbe, Herbert Emde, Wolfram Kissener, Klaus-Christian Paetz
  • Patent number: 6884899
    Abstract: The present invention relates to a process for preparing 1-amino-4-hydroxyanthraquinones of the formula (I) wherein R is an aliphatic or aromatic radical, by reacting 1,4-dihydroxyanthraquinone, optionally as a mixture with 2,3-dihydro-1,4-dihydroxyanthraquinone, with aliphatic or aromatic amines in the presence of N-methyl-2-pyrrolidone.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: April 26, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christoph Thiebes, Josef-Walter Stawitz
  • Patent number: 6884897
    Abstract: A process is provided for preparing 3,6-dihydro-2H-pyran-2-carboxylic esters via a thermal hetero Diels-Alder reaction of 1,3-dienes with glyoxylic esters without the use of catalysts and stabilizers using a special metering technique.
    Type: Grant
    Filed: February 19, 2003
    Date of Patent: April 26, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventor: Michael Lögers
  • Patent number: 6872861
    Abstract: The invention relates to a process for preparing polyfluoroalkyl-lithium compounds by deprotonation of polyfluoroalkyl compounds by means of lithium bases.
    Type: Grant
    Filed: June 7, 2002
    Date of Patent: March 29, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Marielouise Schneider, Albrecht Marhold, Alexander Kolomeitsev, Alexander Kadyrov, Gerd-Volker Röschenthaler, Jan Barten
  • Patent number: 6861398
    Abstract: The present invention relates to stable thixotropic polysuccinimide (PSI) dispersions, known as slurries, and to their use as additives for improving the flow properties of concrete, in oil wells, in acidic gel cleaners, and in drainage systems of tunnel constructions.
    Type: Grant
    Filed: May 21, 2002
    Date of Patent: March 1, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Thomas Klein, Joachim Voss, Holger Schmidt, Fred Ebert, Harry-Günter Müller
  • Patent number: 6858756
    Abstract: The present invention relates to a process for the arylation of olefins by reaction of haloaromatics or arylsulfonates with olefins in the presence of a palladium catalyst, a bulky nitrogen base and a dipolar aprotic solvent.
    Type: Grant
    Filed: November 27, 2002
    Date of Patent: February 22, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Florian Rampf, Markus Eckert
  • Patent number: 6852831
    Abstract: The present invention relates to alkylenedioxythiophenes of the formula I having urethane-containing side groups: to their preparation and to their oligo- and polymeric derivatives (oligo- and poly(alkylenedioxythiophene)s).
    Type: Grant
    Filed: April 8, 2003
    Date of Patent: February 8, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventor: Knud Reuter
  • Patent number: 6849205
    Abstract: The present invention relates to a coating composition containing an oxidatively drying binder and, as anti-skinning agents, a mixture of A) an aliphatic amine corresponding to formula (Ia) and/or its salts corresponding to formula (Ib): ?wherein R1, R2 and R3 each independently of the others represents hydrogen (H); a linear or branched C1-C20-alkyl radical which is optionally unsaturated or which is optionally mono- or poly-substituted by a hydroxyl radical, an alkoxy radical, an amine radical corresponding to the formula N(R1)(R2), or a C5-C7-cycloalkyl radical, and A? represents a salt-forming anion, and B) with a compound corresponding to formula (II) ?wherein R1 and R4 each independently of the other represents hydrogen (H), a C1-C4-alkyl radical, a C6-C24-aryl radical or a C5-C7-cycloalkyl radical, a hydroxyl radical or a C1-C4-alkoxy radical, —O? (oxygen anion), R2 represents H, a C1-C4-alkyl radical, or A? (anion), R3 represents H, a C1-C4-alkyl radical, and n represents 0, 1 or 2.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: February 1, 2005
    Assignee: Borchers GmbH
    Inventor: Andreas Steinert
  • Patent number: 6846335
    Abstract: A novel crystal form of C.I. Solvent Orange 60 gives a higher space-time yield in dye synthesis and is more easily finished.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: January 25, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Stephan Michaelis, Josef-Walter Stawitz
  • Patent number: 6846336
    Abstract: The present invention relates to acid-resistant solutions containing aromatic formaldehyde condensation products having sulfonate and/or carboxylate groups, aliphatic carboxylic acids, aromatic sulfonic acids, and glycol ether solvents, to the preparation thereof, and to their use as leveling agents, dispersants or fastness improvers in textile finishing, as tanning agents for leather, and in the stain resist finishing of textile materials.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: January 25, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Gerle, Klaus Walz, Hans Albert Ehlert, Ralf Heinen
  • Patent number: 6844462
    Abstract: The invention relates to the biphenyldiols of the formula (V) The corresponding racemic and enantiomerically pure triflate compounds thereof, where R1 and R2 are H, R3 is chlorine, and R4 is methoxy. In an alternate embodiment, R1 and R2 are hydrogen and R3 and R4 are C1-C4-alkoxy, fluorine, or chlorine.
    Type: Grant
    Filed: April 7, 2003
    Date of Patent: January 18, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Drieben-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz
  • Patent number: 6841696
    Abstract: The invention relates to N-unsubstituted imidic ester alkyl sulphates, N-unsubstituted amidinium alkyl sulphates and a process for their preparation, which is characterized in that carboxamides are converted with sulphuric diesters into the corresponding imidic ester alkyl sulphates, which are reacted further with ammonia to give the analogous amidinium alkyl sulphates.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: January 11, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Helmut Kraus, Rosemarie Wodarsch
  • Patent number: 6835725
    Abstract: Optical data carrier comprising a preferably transparent substrate which may, if desired, have previously been coated with one or more reflection layers and to whose surface a light-writeable information layer, if desired one or more reflection layers and if desired a protective layer or a further substrate or a covering layer have been applied, which can be written on or read by means of blue, red or infrared light, preferably laser light, where the information layer comprises a light-absorbent compound and, if desired, a binder, characterized in that at least one cyanine dye is used as light-absorbent compound.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: December 28, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Berneth, Friedrich-Karl Bruder, Wilfried Haese, Rainer Hagen, Karin Hassenrück, Serguei Kostromine, Peter Landenberger, Rafael Oser, Thomas Sommermann, Josef-Walter Stawitz, Thomas Bieringer
  • Patent number: 6835842
    Abstract: The 3-nitroisoxazoles of the formula (I) in which R1 and R2 are each as defined in the description, some of which are known, are highly suitable for use as biocides for protecting industrial materials.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: December 28, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Uhr, Oliver Kretschik, Martin Kugler, Peter Wachtler
  • Patent number: 6833455
    Abstract: Disclosed herein are bridged perinones/quinophthalones of the general formula (I) or tautomeric forms thereof where X1, X2, Ar1 Ar2 and B are as described herein and are particularly characterized in that the bridging B is a radical of the formula —T1—W—T2—, where T1 and T2 are independently O or S and W is alkylene, especially C1-C6-alkylene, C6-C10-arylene, especially phenylene or cycloalkylene, which are each optionally substituted or is the radical of the formula (a) where the phenyl rings are optionally substituted and A is a radical of the formula O, S, SO, SO2 or CO, optionally substituted alkylene, or optionally substituted cycloalkylene, said alkylene or cycloalkylene being attached to the adjacent phenyl rings itself or else via its substitutents, or W is a radical of the formulae where s and t are independently from 1 to 6, the ends of the radical B each being attached to an aromatic carbon atom of the two radicals Ar1
    Type: Grant
    Filed: November 22, 2002
    Date of Patent: December 21, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christoph Thiebes, Josef-Walter Stawitz, Ulrich Feldhues
  • Patent number: 6833182
    Abstract: A composition suitable for sizing of glass fibers is disclosed. The composition contains water dispersible, water-soluble or water emulsifiable resin selected from the group consisting of polyepoxide, polyester, polyvinyl acetate, polyacrylate and polyurethane, water, an organofunctional silane, and a nucleating agent. Optional components include emulsifiers, lubricants, wetting and anti-static agents. Glass fibers sized with the composition are suitable for preparing composites having improved mechanical properties.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: December 21, 2004
    Assignees: Bayer Aktiengesellschaft, Bayer Antwerpen N.V.
    Inventors: Raymond Audenaert, Detlev Joachimi, Alexander Karbach, Stephan Kirchmeyer, Joachim Simon
  • Patent number: 6828455
    Abstract: Process for preparing compounds of the formula (I) characterized in that an acrylic compound of the formula is reacted with an amine of the formula in which R1, R2, R3, R4 and Z are as defined in the description.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: December 7, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef-Walter Stawitz, Ulrich Feldhues
  • Patent number: 6825377
    Abstract: This invention relates to process for dihydroxylation of olefins using transition metal catalysts to obtain monofunctional, bifunctional, and/or polyfunctional 1,2-diols of the formula (I) R1R2C(OH)—C(OH)R3R4  (I) where R1 to R4 are defined herein, by reacting an olefin of the formula (II) R1R2C═CR3R4  (II) where R1 to R4 are defined as for formula (I), with molecular oxygen in the presence of an osmium, ruthenium, or manganese compound in water or a water-containing solvent mixture at a pH of from 7.5 to 13.
    Type: Grant
    Filed: October 19, 2001
    Date of Patent: November 30, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Matthias Beller, Christian Döbler, Gerald Mehltretter, Uta Sundermeier
  • Patent number: 6825357
    Abstract: The invention relates to substituted or unsubstituted benzodioxinothiophenes, their preparation and their use for preparing electrically conductive oligomers or polymers, also oligomers or polymers comprising these thiophene derivatives as repeating unit.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: November 30, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Günter Rauchschwalbe, Alexander Klausener, Stephan Kirchmeyer, Knud Reuter
  • Patent number: 6822095
    Abstract: The present invention relates to a process for preparing 4,6-dichloropyrimidine by reaction of 4-chloro-6-hydroxypyrimidine with an acid chloride.
    Type: Grant
    Filed: December 19, 2001
    Date of Patent: November 23, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Günther Cramm, Alexander Klausener, Guido Steffan