Patents Represented by Attorney Diderico van Eyl

Find this attorney in the Justia Lawyer Directory

  • Method for preparing 1-alkyl-pyrazol-5-carboxylic acid esters III
    Patent number: 6444828
    Abstract: 1-Alkyl-pyrazole-5-carboxylic esters are obtained with surprisingly low proportions of 1-alkyl-pyrazole-3-carboxylic esters if a 2,4-diketo ester and/or an enolate thereof is reacted with an alkylhydrazine and/or a corresponding alkylhydrazinium salt, if appropriate, in the presence of a solvent and/or of water, in such a manner that during at least about 90% of the reaction free alkylhydrazine is present.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: September 3, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Nikolaus Müller, Michael Matzke
  • Preparation of aliphatic &agr;, &ohgr;-dicarboxylic acids
    Patent number: 6437180
    Abstract: A process for preparing aliphatic C4-18 &agr;,&ohgr;-dicarboxylic acids by oxidation of C6-20 &agr;,&ohgr;-dienes with hydrogen peroxide or compounds which release hydrogen peroxide under the reaction conditions as is characterized in that the reaction is carried out in the presence of a transition metal catalyst of group VI and of a mixture containing at least one organic acid and one aprotic organic solvent. A specific temperature profile is maintained at different phases of the reaction, which increases yield and selectivity.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: August 20, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Michael Schelhaas, Helmut Greiving, Manfred Jautelat
  • Process for preparing 2-halogenated indan-1-ones
    Patent number: 6433228
    Abstract: 2-Halogenoindan-1-ones are prepared in an advantageous manner by converting anilines into diazonium salts and these, with acrylic compounds, into 3-phenyl-1-halogenoproprionic acid derivatives, and latter are cyclized.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: August 13, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Joachim Komoschinski, Helmut Fiege, Guido Steffan, Klaus-Christian Paetz
  • Moulded part and flexible film with a protected printed conductor, and method for producing the same
    Patent number: 6426143
    Abstract: A shaped plastic part and a flexible film with a protected conductor track, in particular made from copper, are described, as is a process for their production. The shaped plastic part or the flexible film is composed at least of a plastic film (1) as backing layer, and of a metalizable primer layer (2) applied thereto, and of a structured, metallic electrically conducting layer (3), in particular electrical conductor tracks, applied to the primer layer (2), where an additional outer film (4) or a plastic article (6) has been firmly connected to the composite made from backing layer (1), primer layer (2) and from conducting layer (3) in such a way that the outer film (4) or the plastic article (6) covers at least part of the conducting layer (3).
    Type: Grant
    Filed: September 19, 2000
    Date of Patent: July 30, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Jochen Voss, Gerhard Dieter Wolf, Friedrich Jonas
  • Process for preparing phosphoric acid esters
    Patent number: 6420465
    Abstract: The present invention relates to a process for preparing phosphoric acid esters, in particular monomeric bisaryl diphosphates, or bridged phosphates.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: July 16, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Nikolaus Janke, Reinhard Pech, Andreas Chrisochoou, Dieter Heinz, Werner Bäcker, Kaspar Hallenberger
  • Antifouling agents, their production and use, and antifouling coating produced therefrom
    Patent number: 6413446
    Abstract: The present invention relates to antifouling agents containing (A) at least one multifunctional carbosilane and/or carbosiloxane of formula (I) Q[(CH2)mSiR1nX(3−n)]p  (I)  and/or a partial condensation product thereof, wherein each R1 is independently a C1-C18 alkyl and/or C6-C20 aryl, X is OH, C1-C4 alkoxy, C6-C20 aryloxy, or C1-C6 acyloxy, n is 0 to 2, m is 2 to 6, p is an integer ≧2, and Q is either (i) a linear or cyclic silane or siloxane or (ii) an unsubstituted hydrocarbon or a hydrocarbon in which at least one carbon atom is substituted with at least one member of the group consisting of O, N, S, and P, and optionally (B) one or more alkoxysilanes, (C) an organic solvent and/or water, (D) a catalyst, (E) inorganic nanoparticles, and/or (F) other additives.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: July 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Markus Mechtel, Michael Mager, Karl-Heinz Käsler
  • Solvent-free binder compositions and their use in one- and two-component coating compositions
    Patent number: 6410095
    Abstract: The present invention relates to substantially solvent-free binder compositions containing a) a polyisocyanate component containing heteroallophanate groups and having aromatically-bound isocyanate groups, i) an NCO content of 3 to 16%, ii) an average functionality of 1.8 to 4, iii) an allophanate group content (calculated as C2N2O3, MW: 101) of 5 to 35% and iv) a hydrocarbon chain content of 10 to 65%, wherein the hydrocarbon chains are attached to allophanate groups via oxygen and have an average of 2 to 23 carbon atoms and b) an isocyanate-reactive component. The present invention also relates to the use of these binder compositions in one- and two-component coating compositions.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: June 25, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Brahm, Gerhard Ruttmann, Lutz Schmalstieg
  • Electrolysis plate
    Patent number: 6395155
    Abstract: An electrolysis plate is described which consists of an outer non-conductive frame, particularly a frame having a fiber-reinforced cresol resin, an electrically conductive, bipolar graphite plate which is mounted therein and is preferably slotted on both sides, and, in the region of the electrolyte feed, has plastic skirts for the forced direction of the electrolyte solutions.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: May 28, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Bernd Bressel, Hans-Joachim Kramann
  • Sintered silicon nitride, components made therewith, specially valves, methods for the production and use thereof
    Patent number: 6395661
    Abstract: A sintered Si3N4 material, valves and components made with the material, and methods for making same.
    Type: Grant
    Filed: October 4, 1999
    Date of Patent: May 28, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Wötting, Ernst Gugel, Hans Andreas Lindner, Peter Woditsch
  • Process for preparing biodegradable polymers having repeating succinyl units
    Patent number: 6395870
    Abstract: A process for preparing biodegradable polymers having repeating succinyl units, characterized in that an optionally substituted 1,4-butanedicarboxylic acid, or a 1,4-butanedicarboxylic acid derivative is reacted with an acid anhydride.
    Type: Grant
    Filed: September 29, 1999
    Date of Patent: May 28, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventor: Ruediger Schubart
  • Process for preparing perfluorinated organic compounds by electrochemical fluorination
    Patent number: 6395165
    Abstract: A novel process for the continuous preparation of perfluorinated organic compounds by electrochemical fluorination of the parent non-fluorinated or partially fluorinated organic compounds using hydrogen fluoride having an arsenic content of less than about 10 ppm can be operated over a prolonged period of time without the electrode area-time yield decreasing over time.
    Type: Grant
    Filed: June 22, 2001
    Date of Patent: May 28, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Andreas Bulan, Joachim Herzig, Günter Lailach
  • Auxiliary layers for electroluminescent assemblies
    Patent number: 6391481
    Abstract: The invention relates to an electroluminescent assembly containing, as hole injection layer, a polymeric organic conductor that has been applied either from solution or from a dispersion and contains particles having a particle size of less than 1 &mgr;m.
    Type: Grant
    Filed: September 8, 1999
    Date of Patent: May 21, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Jonas, Rolf Wehrmann, Andreas Elschner, Helmut-Werner Heuer
  • Racemization of R,S-dioxo-benzylpyrrolopiperidine
    Patent number: 6392044
    Abstract: Cis-R-dioxo-benzylpyrrolopiperidine is racemized in a particularly advantageous manner by treating it with a substoichiometric amount of base, preferably at temperatures below about 40° C.
    Type: Grant
    Filed: June 30, 2000
    Date of Patent: May 21, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Herbert Diehl, Georg Martin, Wilfried Jaworek, Andreas Krebs, Joachim Westen
  • Electrochromic device having improved light stability
    Patent number: 6388796
    Abstract: The invention relates to an electrochromic device having (a) a pair of glass or plastic plates or plastic films wherein at least one such plate or film is provided on one side each with an electrically conductive coating, wherein (1) at least one such plate or film and its conductive coating is transparent, (2) the other such plate or film and its conductive coating is optionally mirrored, (3) the electrically conductive layer of one or both of the two plates or films is optionally divided into separate segments optionally provided with individual contacts, and (4) the plates or films are joined on the sides of their conductive coating by means of a sealing ring to form a volume; and (b) the volume formed by the two plates or films and the sealing ring is filled with an electrochromic medium containing certain dihydronaphthazines or dihydrophenazines.
    Type: Grant
    Filed: February 9, 2000
    Date of Patent: May 14, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Horst Berneth, Ralf Neigl
  • Method of preparing 4,5,6-trichloro-and 2,4,5,6-tetrachloropyrimidine
    Patent number: 6369259
    Abstract: Crystals with an average crystal size of ≦10 &mgr;m comprising compounds of the formula Ia and/or IIa A process for making said crystals.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: April 9, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Guido Steffan, Georg Hardenbicker
  • Conditioning method for dehydrating clarification sludge
    Patent number: 6368511
    Abstract: A process is described for dewatering sewage sludge consisting of the combination of an acidic oxidative preconditioning with an inorganic post-conditioning, in which case the preconditioning comprises an acidification of the sewage sludge and a catalytic partial oxidation by addition of a substoichiometric amount of hydrogen peroxide and iron ions at a pH≦5 and then an inorganic post-conditioning is carried out in which the acidified and partially oxidized sewage sludge is admixed with alkaline earth, and in which case, in the inorganic post-conditioning, sufficient calcium hydroxide (Ca(OH)2) is supplied so that the pH of the limed sewage sludge is in the range from at least 9 to at most 11, in order thereafter to dewater the conditioned sewage sludge mechanically.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: April 9, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Heinz-Günther Weissenberg, Thomas Melin, Bernhard Vosteen, Joachim Lemke
  • Process for preparing 1-substituted 5-hydroxy-imidazoline-2,4-diones and 1-substituted 5-alkoxy-imidazoline-2,4-diones
    Patent number: 6365752
    Abstract: A process for preparing specific 1-substituted 5-hydroxy-imidazoline-2,4-diones by reacting glyoxylic acid with N-substituted ureas is provided, where this process is carried out in a 10-80% strength aqueous solution and in the presence of an acid catalyst. The 1-substituted 5-hydroxy-imidazoline-2,4-diones can subsequently be converted in a further reaction step to give 1-substituted 5-alkoxy-imidazoline-2,4-diones.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: April 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Witold Broda, Luc Jerome Vanmaele
  • Process for the preparation of aromatic or heteroaromatic sulphonyl chlorides
    Patent number: 6365780
    Abstract: Aromatic or heteroaromatic sulphonyl chlorides of the general formula I in which X may be a C or N, R1 may be fluorine, chlorine, bromine, nitro, methoxy, fluoromethoxy, difluoromethoxy, trifluoromethoxy, C1-C4 alkyl or phenyl, R2 may be H, fluorine, chlorine, bromine, OH, C1-C4 alkyl, are prepared by diazotization of the compounds of the general formula II in which X, R1 and R2 are as defined for formula (I), and decomposition of the resulting diazonium salts in the presence of sulphur dioxide and a copper catalyst, where the compounds of the formula (II) are treated, in a mixture with one or more organic solvents, sulphur dioxide and a copper catalyst, with hydrogen chloride and alkyl nitrite at temperatures of from −20 to +60° C.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: April 2, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Albert Schnatterer, Monika Hermann
  • Process for the preparation of epoxy (meth) acrylates reacting epoxy compounds with anhydride and oh-functional (meth)acrylic-polyetherpolyol
    Patent number: 6359082
    Abstract: The present invention relates to a process for the preparation of epoxy(meth)acrylates by simultaneously reacting 1 equivalent of organic compounds containing epoxide groups with A) 0.8 to 1.2 moles of organic dicarboxylic anhydrides having a molecular weight from 98 to 166 and B) 0.8 to 1.2 OH equivalents of OH group-containing reaction products, which are prepared at a COOH/OH equivalent ratio of 0.6:1 to 0.95:1, of a) (meth)acrylic acid and b) tri- or tetrahydric ether alcohols having a molecular weight of 180 to 1000 and containing at least two ethylene and/or propylene oxide units as part of an ether structure.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: March 19, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventor: Jürgen Meixner
  • Screen printing paste for producing electrically conductive coatings
    Patent number: 6358437
    Abstract: The present invention relates to a screen printing paste having a viscosity of from 1 to 200 dPas, comprising a solution or dispersion of a conductive polymer and optionally binders, thickeners and fillers, and to the use thereof for the production of electrically conductive coatings.
    Type: Grant
    Filed: June 14, 2000
    Date of Patent: March 19, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Friedrich Jonas, Udo Guntermann