Patents Examined by Paul F. Shaver
  • Patent number: 6815554
    Abstract: A process for preparing unsaturated organosilanes containing organic carbonyloxy groups and having the formula (R1O)3−nR2nSi—X—OC(O)C(R3)═CR32  (I), where R1, R2, and R3 are hydrocarbon groups optionally containing interspersed ether linkages, and optionally substituted, X is an alkylene group, optionally containing ether linkages, and n is 0 to 3, by reacting haloorganofunctional silicon compounds of the formula (R1O)3−nR2nSi—X—Y  (II), where Y is a halogen atom, with a salt of an unsaturated organic carboxylic acid of the formula M+[−OC(O)C(R3)═CR32]o  (III), where M is an alkali or alkaline earth metal and o is 0 or 1 depending on the valence of M, in the presence of a phosphonium salt as phase transfer catalyst.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: November 9, 2004
    Assignee: Wacker-Chemie GmbH
    Inventors: Juergen Pfeiffer, Peter John
  • Patent number: 6660875
    Abstract: A method of removing inorganic contamination from dielectric condensate precursor fluids and silicate esters, such as tetraethylorthosilicate (TEOS), methyltriethoxyorthosilicate (MTEOS), hydrogen silsesquioxane (HSQ), methyl silsesquioxane (MSQ), polyarylene ether, benzocyclobutene (BCB), or OSG, includes obtaining a commercial grade fluid having up to 10,000 ppb individual metallic contaminants; converting the sodium form of one or more macroporous ion exchange resin beds to a hydrogen form; converting the chloride form of one or more macroporous ion exchange resin beds to a hydroxide form; drying the macroporous ion exchange resin beds to remove substantially all water from the ion exchange resin beds; passing fluids through the ion exchange resin beds one or more times by recirculating all or a portion of the fluid to obtain a purified fluid having less than 1 ppb of individual metallic contaminants, less than 10 ppb of boron contaminants, and less than 1 ppb of chloride contaminants; and collecting the p
    Type: Grant
    Filed: June 8, 1999
    Date of Patent: December 9, 2003
    Assignee: PPT Technologies, LLC
    Inventor: William H. Mullee
  • Patent number: 6660191
    Abstract: Bifunctional primer naphthalene compounds having the formula: wherein M″ is an alkali metal, preferably sodium or lithium, and R1 and R2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalene derivatives, and are well suited for the improved anionic polymerization of diene, vinylaromatic and/or (meth)acrylic monomers.
    Type: Grant
    Filed: February 5, 1998
    Date of Patent: December 9, 2003
    Assignee: Elf Atochem S.A.
    Inventors: Turgut Nugay, Gérard Riess
  • Patent number: 6608225
    Abstract: 3-methacryloxy- and 3-acryloxyisobutylalkoxysilanes of the general formula (I) and R is a linear alkyl radical having from 1 to 4 carbon atoms, R1 is a linear or branched alkyl radical having from 1 to 3 carbon atoms, and m is 0 or 1.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: August 19, 2003
    Assignee: Degussa AG
    Inventors: Gerald Louis Larson, Albert-Johannes Frings, Andrea Gänser
  • Patent number: 6590116
    Abstract: The present invention is directed to a process for purifying siloxane. The invention relates to a method of making a purified siloxane feedstock for use in the manufacturing of silica glass. The invention further relates to solid phase extracting impurities from a polyalkylsiloxane starting material.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: July 8, 2003
    Assignee: Corning Incorporated
    Inventors: Joseph S. Flynn, Dale R. Powers, Brian P. Strines
  • Patent number: 6586613
    Abstract: Substituted tetrahydro-naphthalenes and analogous compounds are prepared by reducing or condensing appropriate functional substituents in substituted tetrahydro-naphthalenes and analogous compounds by customary methods and converting functional groups in this manner into the desired groups. The compounds according to the invention are suitable for use as active compounds in pharmaceuticals, in particular in pharmaceuticals for treating arteriosclerosis and also dyslipidaemias.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: July 1, 2003
    Assignee: Bayer Aktiengellschaft
    Inventors: Arndt Brandes, Michael Lögers, Jürgen Stoltefuss, Gunter Schmidt, Klaus-Dieter Bremm, Hilmar Bischoff, Delf Schmidt, Stefan Antons, Holger Paulsen, Stephan Nicholas Müller, Paul Naab, Carsten Schmeck
  • Patent number: 6580000
    Abstract: Process for the production of alkoxysilanes of the formula HSi(OR)3, where R is an alkyl group containing 1 to 6 carbon atoms, and/or alkyl orthosilicates of the formula Si(OR)4, where R is an alkyl group containing 1 to 6 carbon atoms. In a preferred embodiment, the process comprises reacting silicon metal with an alcohol in a suitable solvent in the presence of a cupric bis(diorganophosphate) catalyst. A polymeric form of ethyl orthosilicate, a by-product of the reaction, is the preferred solvent. The production of triethoxysilane and tetraethyl orthosilicate is preferred, with triethoxysilane being particularly preferred.
    Type: Grant
    Filed: June 6, 2002
    Date of Patent: June 17, 2003
    Assignee: AK Research Company
    Inventors: Amos R. Anderson, Jeffrey G. Meyer
  • Patent number: 6576780
    Abstract: The current invention discloses hydroxyamidino derivatives useful as nitric oxide synthase inhibitors.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: June 10, 2003
    Assignee: GD Searle & Company
    Inventors: Rolando E. Gapud, Timothy J. Hagen, E. Ann Hallinan, Donald W. Hansen, Jr., Barnett S. Pitzele, Suzanne S. Metz, R. Keith Webber, Foe S. Tjoeng, Robert E. Manning, Mihaly V. Toth
  • Patent number: 6570031
    Abstract: The present invention relates to a novel dendrimic compounds, to a method for the production thereof and to the use thereof as catalysts for the production of polymers, in particular to the use thereof as co-catalysts for metallocenes for polymerizing unsaturated compounds.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: May 27, 2003
    Assignee: Bayer Aktiengesellschaft
    Inventors: Sigurd Becke, Uwe Denninger, Michael Mager, Heike Windisch
  • Patent number: 6566551
    Abstract: For use in a process for the production of (meth)acrylic acid comprising at least a step for the reaction of (meth)acrylic acid by catalytic gas phase oxidation and a step for the absorption thereof, a method for preventing an effluent gas pipe from blocking is disclosed, which method is characterized by causing part or the whole of the gas discharged from the step for absorption, while being circulated via the effluent gas pipe to the step for the reaction or being discarded, to be subjected to temperature elevation and application of pressure and/or mist separation. Particularly by setting the temperature of the waste gas from the absorption column at a level in the range of 30-70° C.
    Type: Grant
    Filed: November 29, 2000
    Date of Patent: May 20, 2003
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Takeshi Nishimura, Yukihiro Matsumoto, Sei Nakahara, Misao Inada, Harunori Hirao, Mamoru Takamura
  • Patent number: 6555662
    Abstract: A process for making a dispersion of a high viscosity siloxane in a volatile cyclosiloxane comprises the step of effecting ring-opening polymerisation of a volatile cyclosiloxane under catalysis by a phosphazene base, and the step of stopping the polymerisation reaction before completion of the ring-opening polymerisation of the cyclosiloxane has occurred. Preferably the polymerisation reaction is stopped by adding carbon dioxide or an acid.
    Type: Grant
    Filed: February 20, 1998
    Date of Patent: April 29, 2003
    Assignee: Dow Corning Ltd.
    Inventors: Remy Bischoff, Richard Taylor
  • Patent number: 6552212
    Abstract: Compositions of matter comprising benzoate esters of hydroxyl terminated polyether polysiloxane copolyols, in particular dimethicone copolyol benzoates, and process for preparing same. The benzoate esters are useful for personal care cleansing products, such as bar and liquid soaps, skin and hair care products and textiles and fibers. The compounds are prepared by reacting benzoic acid with hydroxyl terminated polyether polysiloxane copolyols.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: April 22, 2003
    Assignee: Finetex, Inc.
    Inventors: Ismail I. Walele, Samad A. Syed
  • Patent number: 6552210
    Abstract: Specifically substituted metallocenes can be used in the polymerization of olefins. The novel compounds contain a cationic group as substituents and are suitable as constituents of a catalyst system for the polymerization of olefins.
    Type: Grant
    Filed: September 7, 2000
    Date of Patent: April 22, 2003
    Assignee: Targor GmbH
    Inventors: Markus Göres, Hans Bohnen
  • Patent number: 6552213
    Abstract: The present invention relates to a new stereoselective method for the preparation of tris-O-substituted-(E)-1-(3,5-dihydroxyphenyl)-2-(4-hydroxyphenyl)ethene derivative of the formula (I) which is a key intermediate in the synthesis of trans-resveratrol (I, R2=R2=R3=H). The invention also provides a method for the exclusive synthesis of trans-isomer of compounds of formula (I) without any contamination of cis-isomer.
    Type: Grant
    Filed: May 24, 2002
    Date of Patent: April 22, 2003
    Assignee: Orchid Chemicals & Pharmaceuticals Limited, India
    Inventors: Pandurang Balwant Deshpande, Udayampalayam Palanisamy Senthilkumar, Gnanaprakasam Andrew
  • Patent number: 6552214
    Abstract: A compound comprises a blocked halogenated hydroxydiphenyl ether of the formula: where X1 is a halogen, X2 is chlorine or bromine, X3 is hydrogen, chlorine or bromine, X4 is chlorine, bromine, alkyl having 1 to 3 carbon atoms, —CHO, —CN or —NH2, X5 is chlorine, bromine, methyl, trichloromethyl, —CHO, —CN or —NH2, n is 1 or 2, and R is an ether linkage inhibiting group.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: April 22, 2003
    Assignee: General Electric Company
    Inventors: Frank John Mondello, Ralph Joseph May
  • Patent number: 6548690
    Abstract: The present application describes a porous polymethylsilsesquioxane (PMS) having a specific surface area between approximately 50 m2/g and 500 m2/g, a pore volume between approximately 0.1 cm3/g and 0.8 cm3/g, a monolayer volume between approximately 10 cm3/g and 60 cm3/g, a pore radius smaller than 1 nm for 90% of the pores and insolubility in water and organic solvents. The PMS according to the invention is prepared by precipitation of a polymethylsiliconate of the general formula in which n is a whole number between approximately 20 and 100 and M is an alkaline metal or alkaline-earth metal or NH4+.
    Type: Grant
    Filed: June 6, 2001
    Date of Patent: April 15, 2003
    Assignee: Firmenich SA
    Inventor: Hubert Mimoun
  • Patent number: 6545171
    Abstract: Process for the production of yellow bis(3-[trialkoxy-silyl]alkyl)polysulfanes with an iodine color index of ≦10 mg iodine/100 ml, in which an organic acid is added to neutral chloroalkyltrialkoxysilane and then reacted with sodium polysulfide (NPS) or sodium sulfide (Na2S) and sulfur or sodium polysulfide (NPS) and Na2S in alcohol.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: April 8, 2003
    Assignee: Degussa AG
    Inventors: Roland Krafczyk, Ulrich Deschler, Björn Treffeisen
  • Patent number: 6541650
    Abstract: A process for preparing silanes of the formula 1: RaSiHbCl4-a-b  (1) where R is methyl or ethyl, a is 0, 1, 2 or 3 and b is 0 or 1, from hydrogen chloride gas and reactants selected from among a) silicon metal, b) disilanes and oligosilanes whose radicals are selected from among H, R and Cl,  and mixtures thereof, wherein the hydrogen chloride gas is prepared from H2 and Cl2 in a concerted process.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: April 1, 2003
    Assignee: Wacker-Chemie GmbH
    Inventors: Willi Streckel, Wilfried Kalchauer, Herbert Straussberger
  • Patent number: 6541651
    Abstract: Processes for the preparation of phenyl Grignard reagents in co-solvents of toluene and ether and, the preparation of phenylchlorosilane intermediates using co-solvents of toluene and ether essentially in a one step process. The phenylchlorosilanes in the processes of this invention are important intermediates for the preparation of various silicone materials.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: April 1, 2003
    Assignee: Dow Corning Corporation
    Inventors: Curtis J. Bedbury, John P. Cannady, Binh T. Nguyen
  • Patent number: RE38558
    Abstract: The present invention comprises novel preparations of polyoxypropylene/polyoxyethylene copolymers which retain the therapeutic activity of the commercial preparations, but are substantially free from the undesirable effects which are inherent in the prior art preparations. Because the preparations of polyoxypropylene/polyoxyethylene copolymers which comprise the present invention are a less polydisperse population of molecules than the prior art polyoxypropylene/polyoxyethylene copolymers, the biological activity of the copolymers is better defined and more predictable.
    Type: Grant
    Filed: December 9, 1999
    Date of Patent: July 20, 2004
    Assignee: CytRx Corporation
    Inventors: R. Martin Emanuele, Robert L. Hunter, Paula H. Culbreth