Patents Assigned to E. I. Du Pont de Nemours & Company
  • Synthesis of diaminodinitropyridine
    Patent number: 8115007
    Abstract: A process for the preparation of diaminodinitropyridine or diaminodinitrobenzene by contacting an aminopyridine or aminobenzene with oleum and nitric acid, wherein the improvement comprises adding at least about 1% molar excess of nitric acid, based upon the aminopyridine or aminobenzene with stirring for at least two hours to form first the intermediate sulfonic acid, and then diaminodinitropyridine or diaminodinitrobenzene, and use of such products in the preparation of rigid rod polymers is disclosed.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hasan Dindi, James Arnold Schultz
  • Process for preparing poly(trimethylene ether) glycol and copolymers thereof
    Patent number: 8114957
    Abstract: Processes for preparing relatively high molecular weight poly(trimethylene ether)glycol employing a cocatalyst system are provided.
    Type: Grant
    Filed: February 9, 2009
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Yanhui Niu, Zuohong Yin
  • Deodorant compositions
    Patent number: 8114423
    Abstract: This invention relates to deodorant compositions containing polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) in a variety of physical forms. In at least one embodiment, the polytrimethylene ether glycol homo- and copolymers and/or polytrimethylene glycol ester(s) are derived predominantly from monomers (e.g., 1,3-propanediol) obtained from renewable resources, and are thus more environmentally friendly in terms of manufacture, use and disposal.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: February 14, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Hari Babu Sunkara, Raja Hari Prasad R. Poladi
  • Downhole Well Communications Cable
    Publication number: 20120031607
    Abstract: Communications cable is provided for use in downhole wells wherein the cable will be exposed to a temperature of at least 280° C., the cable including as a component thereof a composition comprising melt-fabricable tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer and melt flowable polytetrafluoroethylene, said polytetrafluoroethylene by itself having no tensile property and being present in said composition in an amount effective to enable the component to withstand this temperature, with the high temperature exposure of the cable component being effective to thermally transform the composition in the solid state, thereby obtaining epitaxial co-crystallization.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 9, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Jacob Lahijani
  • SELF-CONTAINED HAND-HELD YOKE-CONNECTED DEVICE FOR DISPENSING A TWO-PART ADHESIVE AEROSOL
    Publication number: 20120032000
    Abstract: A self-contained, hand-held spray dispensing device includes an internal source of pressurized fluid that exerts a motive force on a pair of liquid ejecting elements to cause each to eject a liquid into a discharge line. The liquids remain separated until each exits its discharge port. A pressurized fluid is directed over the outlet ends of the discharge line beginning before a flow interrupter in the discharge line is opened to permit flow therethrough and ceasing after liquid flow is terminated. The pressurized fluid flow over the outlet of the discharge line aerosolizes liquids emanating from the outlet ends. The liquid ejecting element is connected to a force transmitting yoke. The yoke responds to pressurized fluid from the source to generate the motive force on the ejecting element.
    Type: Application
    Filed: August 5, 2010
    Publication date: February 9, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DONALD H. BRUNK, William Gerald Dimaio, JR.
  • Charge transport compositions and electronic devices made with such compositions
    Publication number: 20120032158
    Abstract: The present invention is directed to a photoactive device comprising an anode, a cathode, and a photoactive layer, which device further comprises an electron transport and/or anti-quenching layer which minimizes both electron transfer quenching and energy transfer quenching of the photoactive layer.
    Type: Application
    Filed: October 17, 2011
    Publication date: February 9, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DANIEL DAVID LECLOUX, Ying Wang
  • CONDUCTIVE PASTE FOR A SOLAR CELL ELECTRODE
    Publication number: 20120031484
    Abstract: The invention relates to a method of manufacturing a solar cell electrode comprising steps of: (a) preparing a semiconductor substrate comprising a negative layer, a positive layer and passivation layers formed on the negative layer and the positive layer; (b) applying a conductive paste onto the passivation layer(s) formed on the positive layer, on the negative layer, or on both of the positive layer and the negative layer, wherein the conductive paste comprises; (i) a conductive powder; (ii) a glass frit comprising 45 to 81 mole percent (mol %) of PbO, 1 to 38 mol % of SiO2 and 5 to 47 mol % of B2O3, based on the total molar fraction of each component in the glass frit; and (iii) a resin binder; and (c) firing the conductive paste.
    Type: Application
    Filed: August 5, 2011
    Publication date: February 9, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Hisashi Matsuno, Norihiko Takeda
  • Flex Life of Tetrafluoroethylene/Perfluoro(Alkyl Vinyl Ether) Copolymer (PFA)
    Publication number: 20120035326
    Abstract: A process is provided for improving the MIT flex life of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer, said perfluoroalkyl containing from 1 to 5 carbon atoms, comprising incorporating melt flowable polytetrafluoroethylene into said copolymer and thereafter heat treating the resultant composition at a temperature of at least 280° C., the amount of said polytetrafluoroethylene and said heat treatment being effective to increase the flex life of said composition by at least 2× the flex life of both said copolymer and said composition prior to said heat treatment and to thermally transform the composition in the solid state, which is epitaxial co-crystallization of the polymer components of the composition.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 9, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventor: Jacob LAHIJANI
  • HYDROGENATION PROCESS FOR THE PREPARATION OF TETRAHYDROFURAN AND ALKYLATED DERIVATIVES THEREOF
    Publication number: 20120035378
    Abstract: A process is provided for the synthesis of tetrahydrofuran and related compounds by hydrogenation of furan and derivatives, using a sponge nickel catalyst that has been promoted with iron and chromium.
    Type: Application
    Filed: April 6, 2010
    Publication date: February 9, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Keith W. Hutchenson, Sourav Kumar Sengupta
  • SOLID FORMS OF AN AZOCYCLIC AMIDE
    Publication number: 20120034315
    Abstract: Disclosed are solid forms of 1-[4-[4-[5-(2,6-difluorophenyl)-4,5-dihydro-3-isoxazolyl]-2-thiazolyl]-1-piperidinyl]-2-[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]ethanone (Compound 1). Methods for the preparation of solid forms of Compound 1 and for the conversion of one solid form of Compound 1 into another are disclosed. Disclosed are fungicidal compositions comprising a fungicidally effective amount of a solid form of Compound 1 and at least one additional component selected from the group consisting of surfactants, solid diluents and liquid carriers. Compositions comprising a mixture of a solid form of Compound 1 and at least one other fungicide or insecticide are also disclosed. Also disclosed are methods for controlling plant diseases caused by fungal plant pathogens comprising applying to a plant or portion thereof, or to a plant seed, a fungicidally effective amount of a solid form of Compound 1.
    Type: Application
    Filed: April 19, 2010
    Publication date: February 9, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mary Ann Hanagan, Matthew Richard Oberholzer, Robert James Pasteris, Rafael Shapiro
  • SEQUENCES DIAGNOSTIC FOR SHRIMP PATHOGENS
    Publication number: 20120034263
    Abstract: Primers have been isolated that are diagnostic for the detection of the white spot syndrome virus (WSSV). The primers are based on a new portion of the WSSV genome and may be used in primer directed amplification or nucleic acid hybridization assay methods.
    Type: Application
    Filed: September 21, 2011
    Publication date: February 9, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Richard C. Ebersole, Jianzhong Zhang, Christian Peter Lenges, Mario W. Chen
  • NON-STICK COATING HAVING IMPROVED ABRASION RESISTANCE, HARDNESS AND CORROSION ON A SUBSTRATE
    Publication number: 20120034448
    Abstract: The present invention provides for a substrate coated with a multi-layer non-stick coating which resists abrasion force and corrosion. The coating comprises a pre-primer base coat layer and at least two further coating layers, wherein at least two of said further coating layers comprise one or more fluoropolymer. The pre-primer base coat layer is substantially free of fluoropolymer, and comprises a heat resistant non-fluoropolymer polymer binder composition and inorganic filler particles, wherein greater than 50% of the inorganic filler particles are titanium dioxide, and wherein at least 10 weight % of said inorganic filler particles are large ceramic particles having an average particle size of at least 14 micrometers, and wherein some or all of the large ceramic particles extend from the pre-primer base coat layer at least into the next adjacent layer.
    Type: Application
    Filed: August 4, 2011
    Publication date: February 9, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventor: YUQING LIU
  • Process for producing glycolic acid from formaldehyde and hydrogen cyanide
    Patent number: 8110382
    Abstract: A process is provided for producing glycolic acid from formaldehyde and hydrogen cyanide. More specifically, heat-treated formaldehyde and hydrogen cyanide are reacted to produce glycolonitrile having low concentrations of impurities. The glycolonitrile is subsequently converted to an aqueous solution of ammonium glycolate using an enzyme catalyst having nitrilase activity derived from Acidovorax facilis 72W (ATCC 57746). Glycolic acid is recovered in the form of the acid or salt from the aqueous ammonium glycolate solution using a variety of methods described herein.
    Type: Grant
    Filed: August 12, 2008
    Date of Patent: February 7, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert DiCosimo, Anna Panova, Jeffery Scott Thompson, Robert D. Fallon, F. Glenn Gallagher, Thomas Foo, Xu Li, George C. Fox, Joseph J. Zaher, Mark S. Payne, Daniel P. O'Keefe
  • Method of making a microwave field director structure having V-shaped vane doublets
    Patent number: 8108992
    Abstract: A method of making a self-supporting field director structure for use in heating an article in a microwave oven comprises in any operative order, the steps of folding a first and a second elongated vane blank along a central fold line to form at least two V-shaped vane doublets; inserting each of the vane doublets into a slotted annular support member so that each vane in each vane doublet extends through an adjacent slot in the annular support member; and attaching the vane doublets at their vertices to define a vane array.
    Type: Grant
    Filed: October 10, 2008
    Date of Patent: February 7, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: William R. Corcoran, Jr.
  • Poly(hydroxyalkanoic acid) and thermoformed articles
    Patent number: 8110138
    Abstract: Disclosed is a process comprising extruding a poly(hydroxyalkanoic acid) (PHA) to produce a first article; thermoforming the first article in a heated mold having a temperature ? about 90° C. to produce a second article; and heat treating the second article by holding the second article in the heated mold for less than about 40 seconds to produce a thermoformed article wherein the PHA composition comprises or consists essentially of PHA and 0 to about 4%, based on the weight of the composition, of a nucleator; and the first article is a film or sheet and is partially crystallized.
    Type: Grant
    Filed: May 6, 2009
    Date of Patent: February 7, 2012
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Julius Uradnisheck
  • BENDABLE CIRCUIT STRUCTURE FOR LED MOUNTING AND INTERCONNECTION
    Publication number: 20120024579
    Abstract: This invention is directed to bendable circuit substrate structures useful for LED mounting and interconnection.
    Type: Application
    Filed: October 7, 2011
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: DANIEL I. AMEY, Deborah R. Gravely, Michael J. Green, Steven H. White
  • CROSS-LINKABLE IONOMERIC ENCAPSULANTS FOR PHOTOVOLTAIC CELLS
    Publication number: 20120024348
    Abstract: Provided herein is a blend composition useful as a cross-linkable encapsulant layer and consisting essentially of two ethylene copolymers and optionally one or more additives. The first ethylene copolymer comprises copolymerized units of ethylene, optionally a first olefin having the formula CH2?C(R1)CO2R2, and a second olefin having the formula CH2?C(R3)COOH. At least a portion of the carboxylic acid groups have been neutralized to form carboxylate salts. The second ethylene copolymer consists essentially of copolymerized units of ethylene, optionally a first olefin having the formula CH2?C(R1)CO2R2, and a third olefin having the formula CH2?C(R4)D. R1, R3 and R4 represent hydrogen or an alkyl group; R2 represents an alkyl group; and D represents a moiety containing an epoxy group. Further provided are solar cell modules comprising the encapsulant layer.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicant: E.I. DU PONT DE NEMOURS AND COMPANY
    Inventors: GEORGE WYATT PREJEAN, Alison Margaret Anne Bennett
  • MULTILAYER STRUCTURES CONTAINING A FLUORINATED COPOLYMER RESIN LAYER AND AN ETHYLENE TERPOLYMER LAYER
    Publication number: 20120024450
    Abstract: Disclosed is a multilayer film laminate comprising a layer consisting essentially of a fluorinated copolymer resin and a layer consisting essentially of an ethylene terpolymer. The ethylene terpolymer layer can be used as an encapsulant layer for solar cells and the multilayer laminate is useful as a component of photovoltaic modules. Methods for preparing photovoltaic modules are also included.
    Type: Application
    Filed: July 30, 2010
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: SAM LOUIS SAMUELS, George Wyatt Prejean
  • MULTILAYER FILMS CONTAINING A FLUORINATED COPOLYMER RESIN LAYER AND AN ENCAPSULANT LAYER
    Publication number: 20120024351
    Abstract: A multilayer film comprises a layer consisting essentially of a fluorinated copolymer resin film and a layer consisting essentially of a blend of two ethylene copolymers. The first ethylene copolymer comprises copolymerized units of ethylene, optionally a first olefin having the formula CH2?C(R1)CO2R2, and a second olefin having the formula CH2?C(R3)COOH. The second ethylene copolymer consists essentially of copolymerized units of ethylene, optionally a first olefin having the formula CH2?C(R1)CO2R2, and a third olefin having the formula CH2?C(R4)D. R1, R3 and R4 represent hydrogen or an alkyl group; R2 represents an alkyl group; and D represents a moiety containing an epoxy group. The multilayer film is useful as an integrated frontsheet or backsheet for photovoltaic modules. Methods for preparing the multilayer film and the photovoltaic modules are also included.
    Type: Application
    Filed: July 29, 2011
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: George Wyatt Prejean, Sam Louis Samuels
  • PROCESS AND REACTOR SYSTEM FOR PRODUCING AMMONIA USING IONIC LIQUIDS
    Publication number: 20120027661
    Abstract: A process and a reactor system for producing ammonia is described. The ammonia produced, such as by the Haber process, is absorbed into an ionic liquid. The removal of ammonia shifts the reaction equilibrium toward the production of ammonia, resulting in higher yields of ammonia.
    Type: Application
    Filed: January 27, 2011
    Publication date: February 2, 2012
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: Mark Brandon Shiflett, Akimichi Yokozeki