Patents Represented by Attorney Diderico van Eyl
  • Patent number: 6586645
    Abstract: The present invention relates to a continuous adiabatic process for preparing nitrochlorobenzene, in which the waste sulfuric acid produced during the practice of the process is reconcentrated and recycled into the nitration reaction.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: July 1, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Demuth, Bernd-Michael König, Thomas Linn, Hans-Joachim Raatz, Hans-Martin Weber, Eberhard Zirngiebl, Ricarda Leiberich
  • Patent number: 6586487
    Abstract: A method for making an energy-absorbing foam having a density that is less than about 7 pcf that exhibits excellent strength properties and that is particularly suitable for automobile bumper applications. The invention is also directed to the energy-absorbing foam made with the method.
    Type: Grant
    Filed: July 12, 2000
    Date of Patent: July 1, 2003
    Assignee: Bayer Corporation
    Inventors: Neil H. Nodelman, David D. Steppan, Alan D. Bushmire, William E. Slack
  • Patent number: 6583327
    Abstract: The present invention relates to a process for the continuous isothermal preparation of mononitrotoluenes with concentration of the resultant waste sulfuric acid and recycling of the concentrated waste sulfuric acid to the process.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: June 24, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Ralf Demuth, Frank Döbert, Harald Petersen, Georg Ronge, Hans-Martin Weber, Thomas Würminghausen, Eberhard Zirngiebl
  • Patent number: 6580002
    Abstract: Trifluoromethyl-substituted biphenylcarboxylic acids are prepared by converting methyl-substituted biphenylcarbonitriles into the corresponding trichloromethyl-substituted biphenylcarbonitriles, converting the trichloromethyl group thereof to a trifluoromethyl group and thus obtaining trifluoromethyl-substituted biphenylcarbonitriles, and preparing the corresponding carboxylic acids therefrom by hydrolysis. A number of intermediates arising during this are novel compounds.
    Type: Grant
    Filed: August 9, 2002
    Date of Patent: June 17, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Müller, Albrecht Marhold, Karen Peilstöcker
  • Patent number: 6576049
    Abstract: This invention relates to paper sizing compositions comprised of at least one sizing agent selected from ASA, AKD and rosin where the at least one sizing agent is emulsified in water, at least one emulsion stabilizer, and from about 0.01% to about 15% by weight of at least one hydrophobic substance, based on the total weight of sizing agent present, provided that the hydrophobic substance is not highly alkoxylated. The sizing promotion efficiency of the paper sizing compositions, as determined by at least one method selected from the Cytec size testing method, the Hercules size testing method, and the Cobb size testing method, is greater than or equal to about 4. Exemplary hydrophobic substances include fatty acid esters, triglycerides, hydrocarbons, esters and/or amides derived from ASA, silicone oils, alcohols, and stearic anhydride. The invention also relates to methods for sizing paper products with these paper sizing compositions and paper or paperboard treated with these sizing compositions.
    Type: Grant
    Filed: May 18, 2000
    Date of Patent: June 10, 2003
    Assignee: Bayer Corporation
    Inventors: Kimberly C. Dilts, Robert J. Proverb, David L. Dauplaise
  • Patent number: 6569361
    Abstract: Electrochromic systems containing soluble electrochromic polymers which are accessible by polymerization, polycondensation or polyaddition from electrochromic monomers are used in devices for variable transparency to electromagnetic radiation.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: May 27, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Berneth, Uwe Claussen, Helmut Werner Heuer, Serguei Kostromine
  • Patent number: 6566298
    Abstract: The invention relates to the preparation and use as catalysts of diphosphines of the formula (I) in which R is C6-C14-aryl or C4-C13-heteroaryl containing 1 to 3 heteroatoms selected from the group consisting of nitrogen, oxygen, and sulfur, wherein the aryl and heteroaryl radicals may optionally be substituted by halogen, C1-C6-alkyl, C1-C6-alkoxy, and/or trimethylsilyl, and R1 to R4, independently of one another, are each hydrogen, C1-C10-alkyl, C1-C10-alkoxy, F, Cl, or Br.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: May 20, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Birgit Driessen-Hölscher, Joachim Kralik, Inga Ritzkopf, Christian Steffens, Guido Giffels, Claus Dreisbach, Thomas Prinz, Walter Lange
  • Patent number: 6562970
    Abstract: The present invention relates to a process for preparing 4-chloro-6-hydroxypyrimidine from 4-chloro-6-methoxypyrimidine.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: May 13, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Franz-Josef Mais, Günther Cramm, Alexander Klausener, Guido Steffan
  • Patent number: 6562290
    Abstract: The invention relates to a process for the production of metallic and metal-ceramic composite components by powder injection molding of a system comprising a metal composite powder, a binder and optionally a ceramic component, where the metal composite powder used is mixed with a protecting liquid in an inert atmosphere before the mixing with the binder. The invention furthermore relates to molybdenum/copper and tungsten/copper composite powders which have a primary metal particle size of predominantly <2 &mgr;m, an oxygen content of <0.8% by weight and optionally a ceramic component, to the use of these composite powders for the production of composite components by powder injection molding, and to a process for the preparation of composite powders in which oxides of molybdenum or tungsten and of copper are mixed, dry-ground and reduced using hydrogen at a temperature of from 800 to 1050° C., and a ceramic component is optionally admixed with the resultant metal composite powder.
    Type: Grant
    Filed: August 20, 2001
    Date of Patent: May 13, 2003
    Assignee: H.C. Starck Inc.
    Inventors: Helmut Meinhardt, Bernd Meyer, Matthias Knüwer, Dietmar Fister, Wolfgang Wiezoreck
  • Patent number: 6559332
    Abstract: The present invention relates to additives for preparing straight-chain or acrylonitrile dimer from acrylonitrile and to a process for preparing straight-chain acrylonitrile dimer from acrylonitrile in the presence of the additives according to the invention.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: May 6, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Christoph Gürtler, Gerhard Braun, Manfred Jautelat
  • Patent number: 6558447
    Abstract: Metal powder Ta and/or Nb, with or without one or metals from the group Ta, Nb, Ti, Mo, W, V, Zr and Hf, is made in a fine powder form by reduction of metal oxide by contact with a gaseous reducing agent, preferably an alkaline earth metal, to near complete reduction, leaching, further deoxidation and agglomeration, the powder so produced being sinterable to capacitor anode form and processable to other usages.
    Type: Grant
    Filed: March 16, 2001
    Date of Patent: May 6, 2003
    Assignee: H.C. Starck, Inc.
    Inventors: Leonid N. Shekhter, Terrance B. Tripp, Leonid L. Lanin, Karlheinz Reichert, Oliver Thomas, Joachim Vieregge
  • Patent number: 6554885
    Abstract: A process is described for the production of metal powder and alloy powders containing at least one of the metals iron, copper, tin, cobalt or nickel, by mixing aqueous metal salt solutions with an aqueous carboxylic acid solution, separating the precipitation product from the mother liquor and reducing the precipitation product to the metal.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: April 29, 2003
    Assignee: H. C. Starck GmbH
    Inventors: Bernd Mende, Gerhard Gille, Benno Gries, Peter Aulich, Jörg Münchow
  • Patent number: 6554884
    Abstract: A process for producing sintered pellets made from blends of refractory metal and refractory metal nitride powders were found to have a higher fraction of intra-agglomerate pores than those made from the refractory metal or refractory metal nitride alone resulting in improved capacitor grade powders, anodes and finished capacitors therefrom. The pellet porosity and total intrusion volume maximizes when the mixture is in the 50-75 W/W % refractory metal nitride range. The total pellet pore surface area was found to be relatively independent of refractory metal nitride concentration above 50%. A substrate consisting of a 50/50 or 25/75 W/W % refractory metal/refractory metal nitride powder mixture should produce solid capacitors with higher capacitance recovery and lower ESR.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: April 29, 2003
    Assignee: H.C. Starck, Inc.
    Inventors: Terrance B. Tripp, Barbara L. Cox
  • Patent number: 6555703
    Abstract: The invention relates to a process for forming a carboxylic benzyl ester comprising reacting a dibenzyl ether with a carboxylic acid in the presence of a heteropolyacid and forming a carboxylic acid benzyl ester.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: April 29, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Pieter Ooms, Bernd-Ulrich Schenke
  • Patent number: 6548685
    Abstract: The invention relates to a process for preparing niobium(V) alkoxides and tantalum(V) alkoxides, in particular niobium(V) ethoxide and tantalum(V) ethoxide, by reacting NbCl5 or TaCl5 with an appropriate alcohol in the presence of ammonia, wherein NbCl5 or TaCl5 is dissolved at a temperature of from about 0° C. to −50° C. in the alcohol containing from about 5 to about 7 mol of ammonia per mol of NbCl5 or TaCl5 to be reacted.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: April 15, 2003
    Assignee: H.C. Starck GmbH
    Inventor: Friedrich Zell
  • Patent number: 6545793
    Abstract: This invention relates to electrochromic devices containing UV-protected electrochromic solutions comprising at least one oxidizable substance RED1 and at least one reducible substance OX2 linked by a bridging group and a UV absorber component.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: April 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Berneth, Helmut-Werner Heuer, Ralf Neigl
  • Patent number: 6544441
    Abstract: The invention relates to frost-stable aqueous alkaline solutions of highly concentrated o-phenylphenol and to their use as preservatives.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: April 8, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Peter Wachtler, Hans-Peter Wirges
  • Patent number: 6534200
    Abstract: Electroluminescent assembly comprising a substrate, an anode, an electroluminescent element and a cathode, where at least one of the two electrodes is transparent in the visible spectral region and the electroluminescent element comprises one or more zones selected from the group consisting of a hole injection zone, a hole transport zone, an electroluminescent zone, an electron transport zone and an electron injection zone in the specified order, where each of the zones present may also assume functions of the other zones mentioned, wherein the electroluminescent element contains a multinuclear metal complex.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: March 18, 2003
    Assignee: Bayer Aktiengesellshaft
    Inventors: Helmut-Werner Heuer, Rolf Wehrmann, Andreas Elschner
  • Patent number: 6534620
    Abstract: The present invention relates to a process for preparing hydroxy-functional polyurethane carbonates by reacting a) a dihydroxy- or higher hydroxy-functional polymer having a number average molecular weight of 500 to 100,000 and containing aliphatic carbonate groups and optionally ester groups with b) compounds containing at least one primary or secondary amino group and at least one hydroxy group to form urethane groups, wherein components a) and b) are present in amounts which correspond to a molar ratio of carbonate and ester groups of component a) to primary and secondary amino groups of component b) of greater than 1:1 to 20:1. The present invention also relates to the hydroxy-functional polyurethane carbonates obtained by this process and to their use as a binder component in polyurethane compositions, especially coating compositions.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: March 18, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Wieland Hovestadt, Martin Melchiors, Hans-Joachim Scholl
  • Patent number: 6531607
    Abstract: The invention relates to immobilized palladium complexes, to a process for their preparation, to their use as catalysts and to a process for the preparation of arylamines using immobilized palladium complexes.
    Type: Grant
    Filed: May 21, 2001
    Date of Patent: March 11, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Lukas Goossen, Martin Hendrix