Patents Represented by Attorney Diderico van Eyl
  • Patent number: 6992201
    Abstract: The present invention relates to a process for preparing phosphites and their transition metal complexes and also to their use in catalytic processes.
    Type: Grant
    Filed: August 26, 2003
    Date of Patent: January 31, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ulrich Scholz, Erasmus Vogl, Arne Gerlach, Jorma Hassfeld
  • Patent number: 6989274
    Abstract: The present invention relates to a method of performing concentration determinations of aqueous solutions of polyaspartic acid and/or salts thereof.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: January 24, 2006
    Inventors: Thomas Klein, Thomas Klausa, Andreas Elschner, Ralf-Johann Moritz, Monika Cordes
  • Patent number: 6989106
    Abstract: A process for the preparation of polymeric condensates, wherein the reaction mixture is fed at least once during the condensation reaction through a zone of high energy density which has an energy density of at least 105 J/m3.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: January 24, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karlheinrich Meisel, Lars Obendorf, Branislav Boehmer, Bernd Thiele, Armin Spaniol, Dietmar Fuchs, Gerd-Friedrich Renner, Thomas Huebbe
  • Patent number: 6986852
    Abstract: The invention relates to a novel conditioning agent based on polysuccinimide, its hydrolysates or its partial hydrolysates, for preventing deposits in standing or flowing water systems.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: January 17, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Sicius, Thomas Sildatke, Thomas Menzel, Wolfgang Wambach, Winfried Joentgen, Thomas Klausa, Thomas Klein
  • Patent number: 6984741
    Abstract: The present invention relates to 5-nitrobenzofurans, to a process for preparing 5-nitrobenzofurans, and to 5-nitro-2,3-dihydrobenzofuran-3-ols, to a process for the preparation thereof and to intermediates.
    Type: Grant
    Filed: August 18, 2003
    Date of Patent: January 10, 2006
    Assignee: Bayer Aktiengesellschaft
    Inventor: Wolfgang Mägerlein
  • Patent number: 6964963
    Abstract: The present invention describes a process for preparing 4-amino-1-naphthol ethers which is characterized in that naphthol ethers are first prepared from 1-naphthols, the former are then converted to the corresponding 4-acetamino-1-naphthol ethers and then the acyl group is cleaved off, and further describes 4-acetamino-1-naphthol ethers obtained thereby.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: November 15, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Komoschinski, Herbert Diehl
  • Patent number: 6956129
    Abstract: Polyhalogenated cinnamic acids and cinnamic acid derivatives are prepared by reacting diazonium salts accessible from polyhalogenated anilines with acrylic acid or acrylic acid derivatives in the presence of a homogeneous, palladium-containing catalyst at about ?5 to about +100° C. Some of the cinnamic acids and cinnamic acid derivatives obtainable in this way are new. Cinnamic acids and cinnamic acid derivatives which can be prepared according to the invention can be used for the preparation of indanones which are precursors for agro- and pharmaceutical chemicals and for substances having liquid-crystalline properties.
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: October 18, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Walter Lange, Joachim Komoschinski, Markus Eckert, Michael Dockner
  • Patent number: 6946526
    Abstract: The present invention is directed to a nitrile polymer vulcanizate having improved hot air aging characteristics. The nitrile polymer vulcanizate may be produced by admixing a composition containing: (i) a nitrile polymer; (ii) a filler; (iii) a metal salt of a secondary amine; (iv) a vulcanization system; and optionally (v) an additive selected from the group consisting of a strong base, a salt of a strong base and a weak acid, a salt of a weak acid, a carbodiimide, a polycarbodiimide and mixtures thereof.
    Type: Grant
    Filed: January 28, 2003
    Date of Patent: September 20, 2005
    Assignee: Bayer Inc.
    Inventors: Frederic Guerin, Judy Hannay, Ezio Campomizzi, Harald Bender
  • Patent number: 6942805
    Abstract: The present invention relates to a process for decolorizing sugar juices by means of monodisperse ion exchangers, preferably anion exchangers, and the use of the same for sugar juice decolorization.
    Type: Grant
    Filed: November 9, 2001
    Date of Patent: September 13, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Karl Soest, Reinhold Klipper, Ulrich Schnegg, Martin Gladysch
  • Patent number: 6936325
    Abstract: An optical recording medium having at least a recording layer 11 and a light transmitting layer 13 formed on a substrate 10, in which the recording layer 11 is made of an organic material for absorbing an incident light of wavelength of 360 nm to 460 nm, and inducing physical change or chemical change to vary the refractive index, the light transmitting layer 13 is 10 ?m to 177 ?m in thickness, the relation between absorption coefficient “k” and pyrolysis temperature Tdec of organic material is 950(° C.)<(Tdec (° C.)?20)/k<4100° C.??(1), and the absorption coefficient “k” is k>0.0.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: August 30, 2005
    Assignees: Sony Corporation, 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, Yuichi Sabi, Takashi Iwamura, Mitsuaki Oyamada, Hidetoshi Watanabe, Sakuya Tamada, Masanobu Yamamoto
  • Patent number: 6933406
    Abstract: The present invention relates to a process for the preparation of 2-halo-6-nitrobenzoic acids by oxidation of 2-halo-6-nitro-benzyl alcohols, esters, ethers, or mixtures thereof with nitric acid and to the use of this process as a step in the preparation of 2-halo-6-nitrobenzoic acids from 2-halo-6-nitrotoluenes.
    Type: Grant
    Filed: June 6, 2000
    Date of Patent: August 23, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Reinhard Langer, Alexander Klausener
  • Patent number: 6921822
    Abstract: The present invention relates to a process for preparing stereoisomerically enriched 4-aryl-4-hydroxybutanoic acid derivatives by reducing 4-aryl-4-ketobutanoic acid derivatives in the presence of ruthenium-containing catalysts.
    Type: Grant
    Filed: June 9, 2003
    Date of Patent: July 26, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hans-Christian Militzer, Boris Bosch, Markus Eckert, Benjamin Meseguer
  • Patent number: 6916876
    Abstract: The invention relates to a powdered thickener preparation based on polyurethane, which can be incorporated particularly well into water-based paints and lacquers and into other aqueous systems, and to their use as rheological additives for thickening preferably aqueous systems.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: July 12, 2005
    Assignee: Borchers GmbH
    Inventors: Peter Manshausen, Frank Sauer, Thomas Steinhoff, Jan Mazanek, Christian Wamprecht, Christel Spinger, Uwe Priesnitz, Peter Happe
  • Patent number: 6916839
    Abstract: The present invention relates to pyrazolylarylalkines and to their use, to a process for preparing pyrazolylarylalkines and also to intermediates.
    Type: Grant
    Filed: January 5, 2004
    Date of Patent: July 12, 2005
    Assignee: Bayer Chemicals Aktiengesellschaft
    Inventors: Wolfgang Ebenbeck, Florian Rampf, Albrecht Marhold
  • Patent number: 6903239
    Abstract: The present invention relates to fluorinated benzaldehydes, to a process for preparing them and also to the use of the fluorinated benzaldehydes for preparing active ingredients, especially in medicaments and agrochemicals.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 7, 2005
    Assignee: Bayer Chemical Aktiengesellschaft
    Inventors: Karen Peilstöcker, Albrecht Marhold
  • Patent number: 6903065
    Abstract: The invention relates to particulate solids comprising more than 90% by weight of natural or synthetic surface-active compounds for which a) the mean particle size of the particulate solid particles is 10 to 3000 ?m, b) the surface-active compounds are solid at room temperature, and c) the surface-active compounds have a melting point of from 25 to 250° C.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: June 7, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter-Roger Nyssen, Dietmar Fuchs, Hans-Peter Müller
  • Patent number: 6896705
    Abstract: The invention relates to novel mixtures of sulfuric esters and specific sulfuric esters that are useful as leveling agents for the dyeing of nitrogenous fiber materials and to a process for their preparation by reacting sulfuryl chloride with specific alcohols.
    Type: Grant
    Filed: July 29, 2004
    Date of Patent: May 24, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventor: Uwe Vogt
  • Patent number: 6893622
    Abstract: The invention relates to a process for the continuous preparation of oleum of a concentration of 10 to 45% by weight of SO3 and/or sulphuric acid of a concentration of 94 to 100% by weight of H2SO4 by combustion of sulphur with atmospheric oxygen according to the principle of superstoichiometric combustion, cooling the resultant sulphur-dioxide-containing gases to 350° C. to 500° C., catalytic conversion of these cooled gases to give sulphur-trioxide-containing gases in the presence of a vanadium-containing catalyst using single or double contact catalysis, absorption of the sulphur-trioxide-containing gases after cooling, if appropriate removal of liquids from the gases after absorption and energy recovery, with liquid sulphur being injected into the hot combustion gas stream perpendicular to the main direction of flow in the form of a fan using one or more bimodal fan-type nozzles.
    Type: Grant
    Filed: August 29, 2002
    Date of Patent: May 17, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Kurt-Wilhelm Eichenhofer, Klaus-Peter Grabowski, Günter Dräger, Martin Kürten, Martin Schweitzer
  • Patent number: 6891007
    Abstract: This invention relates to a process for polymerizing polar substituted norbornenes and/or cycloalkenes, optionally, in the presence of another unsaturated compound. The method is characterized in that the polymerization is carried out in the presence of one or more tungsten carbine complexes.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: May 10, 2005
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Alexsander Ostoja Starzewski, Karin Weiss, Martin Olaf Thüring
  • Patent number: 6891060
    Abstract: The invention relates to an improved process for preparing 3-acyloxy-2-methylbenzoic acids by heating substituted naphthalenes in the presence of alkali metal hydroxides and subsequently acylating.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: May 10, 2005
    Assignee: BayerAktiengesellschaft
    Inventors: Johannes Scherer, Horst Behre, Friedrich Müller-Hauck