Patents Assigned to E
  • Process for improving characteristics of a polyamide
    Patent number: 6258928
    Abstract: A process for improving characteristics such as, whiteness retention, degradation, and dyeability of a polyamide by contacting the polyamide with thiocyanate. A polyamide produced by the process has improved dyed color depth, dyed color uniformity, hue, elimination of light dyeing ends, protection of dye sites from degradation, protection from UV degradation, reduced yellowing or oxidation, and/or resistance to loss of dyeability.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: July 10, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Bennett Ray Baird, David Malcolm Lewis, Kamleshkumar Chunilal Patel
  • Method for dissociating materials
    Patent number: 6254764
    Abstract: An apparatus and method of use for dissociating materials includes a power supply, high energy capacitor, high energy trigger device and an probe and reactor arrangement for treating both solid and medium/media materials. A near instantaneous discharge of the electrical charge stored in the capacitor via the probe can be used to dissociate the material, either medium/media or solid, for a desired result. Hazardous materials can be treated to be rendered non-hazardous, rocks or other solid material can be treated for reduction in size, plant seeds can be treated to enhance plant growth surfaces of granular material can be scored or thermally polished and milk, juices and blood could be treated for sterilization.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: July 3, 2001
    Assignee: E/P Technologies
    Inventors: Peter D. Babington, Daniel T. Green, Maurice Laforet
  • Titanium-containing catalyst composition and processes therefor and therewith
    Patent number: 6255441
    Abstract: A catalyst composition is disclosed. The composition comprises a titanium compound, a solubility promoter, a phosphorus source, a solvent, and optionally a sulfonic acid, a cocatalyst, or both. The cocatalyst can be a cobalt/aluminum catalyst, an antimony compound, or combinations thereof. Also disclosed is a process for producing the composition. The process comprises combining a titanium compound, a solubility promoter, a phosphorus source, a solvent, and optionally a sulfonic acid, a cocatalyst, or both. Further disclosed is a process for using the composition which comprises contacting a carbonyl compound, in the presence of the composition, with an alcohol under a condition suitable for esterification, transesterification, polymerization, or combinations thereof.
    Type: Grant
    Filed: April 15, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald Edward Putzig, Edward Francis McBride, Hiep Quang Do, James Arthur Trainham, Hermann Ludwig Jaeger, Heiner Schulte
  • Comfortable cut-abrasion resistant fiber composition
    Patent number: 6254988
    Abstract: The present invention relates to a comfortable, cut resistant and abrasion resistant, composition composed of cotton, nylon, and p-aramid fibers and used primarily in the sheath for sheath/core yarns in protective apparel.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Reiyao Zhu, Larry John Prickett, Michael R. Baron
  • Process for the manufacture of halocarbons
    Patent number: 6255544
    Abstract: A liquid phase process is disclosed for producing halogenated alkane adducts of the formula CAR1R2CBR3R4 (where A, B, R1, R2, R3, and R4 are as defined in the specification) which involves contacting a corresponding halogenated alkane, AB, with a corresponding olefin, CR1R2═CR3R4 in a solvent and in the presence of a catalyst system containing (i) at least one catalyst comprising monovalent copper, and (ii) at least one ionic promoter selected from the group consisting of substituted ammonium halides, pyridinium and substituted pyridinium halides, and quaternary salts of the type (MQ4)Y where M is an element of Group VA of the Periodic Table (i.e., N, P, As, Sb, or Bi), Q is a C1-C18 hydrocarbyl group, and Y is chloride, bromide or iodide. Production of hydrofluoroalkanes by reacting selected adducts of the type produced above with HF is also disclosed.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Allen Capron Sievert
  • Measuring and dispensing system for solid dry flowable materials
    Patent number: 6253959
    Abstract: A portable apparatus for measuring and dispensing solid dry flowable materials, comprising a hopper for containing material, a quantitative measuring device having a dispensing outlet, material inlet means in communication with said hopper and said quantitative measuring device for regulating the flow of material between, system control means in communication with quantitative measuring device for controlling type of measurement and quantity of material and a receptacle in communication with the dispensing outlet of said quantitative measuring device.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Lawrence Doka Gaultney, Joseph Francis Gerling
  • Livestock feedlot adaptation treatment method and product
    Patent number: 6255287
    Abstract: A method of preparing a product for treating livestock comprising providing as ingredients molasses, water, ethyl alcohol, chelated minerals, and at least a vitamin mix. The method includes the steps of mixing the ethyl alcohol and water first, then adding each of the remaining ingredients separately to the mixture of ethyl alcohol and water. The composition is then mixed until homogeneous to provide a liquid treatment which, when introduced into livestock, will reduce considerably the length of, and amount of, lot adaptation stress.
    Type: Grant
    Filed: February 16, 1996
    Date of Patent: July 3, 2001
    Assignee: Vit-E-Men Co., Inc.
    Inventors: Charles Watson, Scott Charles Watson, George G. Gentry
  • Fungicidal fused bicyclic pyrimidinones
    Patent number: 6255311
    Abstract: A method for controlling wheat powdery mildew is provided which encompasses applying to the plant, seed, seedling or portion of the plant to be protected, or, to its growing media, an effective amount of a compound of Formula II where Q is O, n is 0, R3 is halogen, R4 is halogen or hydrogen, R5 is an alkyl group having from three to five carbon atoms and R6 is an alkyl group having from three to eight carbon atoms. Also provided are certain compositions for controlling wheat powdery mildew which contain a compound of Formula II together with a surfactant, an organic solvent and/or a solid or liquid diluent. Also provided are certain fungicidal compounds within Formula II for controlling wheat powdery mildew.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: James Francis Bereznak, Zen-Yu Chang, Thomas Paul Selby, Charlene Gross Sternberg
  • Esterification process
    Patent number: 6255442
    Abstract: A process that can be used in an esterification and polycondensation processes to produce a polyester such as, for example, poly(trimethylene terephthalate) is disclosed. The process comprises contacting an acid with 1,3-propanediol in the presence of a catalyst comprising tin and titanium. A copolymer that contains up to 20 mole percent of another acid and/or a second alcohol is also disclosed. Further disclosed are a composition of, or comprising, a bis(3-hydroxypropyl) terephthalate prepolymer or a composition of, or comprising, a poly(trimethylene terephthalate) polymer. The bis(3-hydroxypropyl) terephthalate prepolymer and poly(trimethylene terephthalate) can each contain 10 to 100 ppm tin and 10 to 200 ppm titanium relative to the terephthalic acid content.
    Type: Grant
    Filed: February 8, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph V Kurian, Yuanfeng Liang, Donald Edward Putzig
  • Treatment of effluent streams containing organic acids
    Patent number: 6254779
    Abstract: An acidic organics-containing waste water stream (12) derived from for example plant for the production of an aromatic carboxylic acid such as terephthalic acid is treated to allow recovery of alkali and water for recycle to the production process. The treatment comprises adjusting the pH of the waste water stream using an alakaline medium, oxidising (10) the organics content of the stream to convert the same to water, carbon dioxide and (bi)carbonate ions, and supplying the treated stream to a reverse osmosis membrane (28, 30) to produce a retentate containing (bi)carbonate ions and cations derived from the alkaline medium and a permeate which is substantially free of those components. The retentate (46) is recycled for use in adjustment of the pH of the waste water stream and, if desired, water-consuming facilities which can tolerate less pure water.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Ian Charles Jeffery, Christopher Howard Jackson
  • Partially fluorinated polymers
    Patent number: 6255543
    Abstract: Selected novel partially fluorinated &agr;,&ohgr;-dienes can be free radically (co)polymerized to form polymers in which cyclic structures are present. The polymers are useful for films, coatings and molded parts.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Zhen-Yu Yang
  • Nail polish compositions containing acrylic polymers
    Patent number: 6254878
    Abstract: Colored and clear nail polish compositions comprise a solvent system having no more than 30 weight % water, a film forming acrylic binder prepared from (meth)acrylic monomers and stirene and which further contain specific adhesion promoting monomers or monomer combinations selected from (1) anhydride, anhydride plus acid, anhydride plus ureido, anhydride plus beta-diketone; (2) acid plus hydroxy; and (3) ureido, ureido plus acid, or ureido plus beta-diketone have properties equal to or better than commercially available nail polish compositions and permit the formulation of all acrylic pigmented nail polish compositions.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Milan Bohuslav Bednarek, Christopher Scopazzi
  • Plant aminoacyl-tRNA synthetase
    Patent number: 6255090
    Abstract: This invention relates to an isolated nucleic acid fragment encoding an aminoacyl-tRNA synthetase. The invention also relates to the construction of a chimeric gene encoding all or a portion of the aminoacyl-tRNA synthetase, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of the aminoacyl-tRNA synthetase in a transformed host cell.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: July 3, 2001
    Assignees: E. I. du Pont de Nemours & Company, Pioneer Hi-Bred, INternational, Inc
    Inventors: Layo O. Famodu, Emil M. Orozco, Jr., J. Antoni Rafalski
  • Starch biosynthetic enzymes
    Patent number: 6255114
    Abstract: This invention relates to isolated nucleic acid fragments encoding all or a substantial portion of a plant glycogenin or water stress protein. The invention also relates to the construction of chimeric genes encoding all or a portion of a plant glycogenin or water stress protein, in sense or antisense orientation, wherein expression of the chimeric gene results in production of altered levels of a plant glycogenin or water stress protein in a transformed host cell.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours & Company
    Inventors: Jonathan Edward Lightner, John D. Everard
  • Polymerization of olefins
    Patent number: 6255414
    Abstract: Olefins such as ethylene and propylene may be polymerized by using as catalysts novel selected transition metal complexes of bis(carboximidamidatonates) in which the carboximidamidatonate groups are connected together through covalent bonds by a bridging group. The resulting polymers are useful as molding and extrusion resins.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Steven Dale Ittel, Edward Bryan Coughlin, Ying Wang
  • Cables with a halogen-free recyclable coating comprising polypropylene and an ethylene copolymer having high structural uniformity
    Patent number: 6255399
    Abstract: A cable, in particular for power transmission, for telecommunications or for data transmission, or also combined power/telecommunications cables, wherein at least one coating layer consists of a recyclable material which is halogen-free and has superior mechanical and electrical properties. This material consists of a polymer mixture comprising: (a) a crystalline propylene homopolymer or copolymer; and (b) a copolymer of ethylene with at least one alpha-olefin having from 4 to 12 carbon atoms, and optionally with a diene; the said copolymer (b) being characterized by a density of between 0.90 and 0.86 g/cm3 and by a Composition Distribution Index, defined as the weight percentage of copolymer molecules having an alpha-olefin content within 50% of the average total molar content of alpha-olefin, of greater than 45%.
    Type: Grant
    Filed: July 23, 1998
    Date of Patent: July 3, 2001
    Assignee: Pirelli Cavi e Sistemi S.p.A.
    Inventors: Luca Castellani, Eduardo Redondo Grizante, Antonio Zaopo, Enrico Albizzati
  • Production of aromatic carboxylic acids and recovery of Co/Mn catalyst from ash
    Patent number: 6255510
    Abstract: Cobalt and/or manganese is recovered from the ash obtained following incineration of the catalyst containing residue arising from the liquid phase oxidation of an aromatic carboxylic acid such as terephthalic acid. Recovery is effected by contacting the ash with an organic acid or an organic acid anhydride such as acetic anhydride, optionally in the presence of bromide ions (e.g. HBr), so that the cobalt and/or manganese metals are recovered as monocarboxylic acid soluble salts thereof thus permitting recycle thereof to the liquid phase oxidation process.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: David John Royall, Julie Ann Bartlett, Roger Gaskell Fairhurst
  • Nitrous oxide compositions
    Patent number: 6254798
    Abstract: This invention relates to compositions that include nitrous oxide and at least one of trifluoromethane, difluoromethane, tetrafluoroethane, pentafluoroethane, perfluoroethane or ethane. These compositions are useful as refrigerants, cleaning agents, expansion agents for polyolefins and polyurethanes, refrigerants, aerosol propellants, heat transfer media, electronic gases, plasma etchants, gaseous dielectrics, fire extinguishing agents, power cycle working fluids, polymerization media, particulate removal fluids, carrier fluids, buffing abrasive agents, and displacement drying agents.
    Type: Grant
    Filed: March 19, 1998
    Date of Patent: July 3, 2001
    Assignee: E. I. du Pont de Nemours and Company.
    Inventors: Barbara Haviland Minor, Donald Bernard Bivens, Clifford Keith Rice, James Richard Sand
  • High tunability CMOS delay element
    Patent number: 6255881
    Abstract: The delay element consists of a differential amplifier (M15, M8, M2, M6, M5) in which the load transistors (M2, M5) are associated to respective gate biasing transistors (M21, M22) connected in a source follower configuration, and to feedback transistors (M3, M4), which implement a negative impedance in parallel to a positive impedance represented by each of the load transistors (M2, M5). The modulation of the delay is achieved by modulating the bias currents of the load transistors (M2, M5), the feedback transistors (M3. M4) and the gate biasing transistors (M21, M22).
    Type: Grant
    Filed: November 17, 1999
    Date of Patent: July 3, 2001
    Assignee: Cselt- Centro Studi E Laboratori Telecomunicazioni S.p.A.
    Inventors: Emanuele Balistreri, Marco Burzio
  • Offset watch case
    Patent number: D444395
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: July 3, 2001
    Assignee: E. Gluck Corporation
    Inventor: Claudia Upton