Patents Assigned to E
  • Process for production of sodium cyanide
    Patent number: 4847062
    Abstract: A process for producing anhydrous sodium cyanide crystals by absorbing hydrogen cyanide synthesis gas that contains oxides of carbon and water in aqueous sodium hydroxide and crystallizing the sodium cyanide solution that results from the absorption. The sodium carbonate that forms in the absorption is not removed prior to crystallization.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventors: Janet M. Rogers, Harold F. Porter
  • Hybrid acrylic star polymers
    Patent number: 4847328
    Abstract: Hybrid star polymers with functional acrylic arms and crosslinked cores.
    Type: Grant
    Filed: March 30, 1987
    Date of Patent: July 11, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Clyde S. Hutchins, Harry J. Spinelli
  • Surface illumination device using optical conductors
    Patent number: 4845596
    Abstract: An illumination device for producing uniform illumination of a surface, comprising several parallel optical conductors which are placed above an optically reflecting surface, and whose reflecting outside sheath is removed locally at least in such a way that the light thereby emerging from the optical conductor is reflected by the reflecting surface to the surface to be illuminated. The optical conductors are spaced at such intervals and placed at such a distance above the reflecting surface that the light reflected by the reflecting surface can reach the surface to be illuminated on the other side of the optical conductors through the space between the optical conductors in such a way that the most uniform possible illumination of said surface is obtained.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bob Mouissie
  • Optical telecommunication package switching system using asynchronous techniques
    Patent number: 4845702
    Abstract: An optical switching system, wherein the input channels carrying packetized data are switched one-by-one at high bit rate to output channels through an optical switching network. The packets of a generic input channel are time compressed, converted into optical signals and, at suitable instants, sent to an optical switching network to be switched to the desired output channel, they are then reconverted into electrical signals and expanded to their original duration. A centralized processor controls the channel switching through the switching network by means of a driving circuit.
    Type: Grant
    Filed: February 23, 1988
    Date of Patent: July 4, 1989
    Assignee: CSELT - Centro Studi e Laboratori Telecomunicazioni SpA
    Inventor: Flavio Melindo
  • Preparation of macromonomers
    Patent number: 4845156
    Abstract: Macromonomer prepared by contacting and reacting a polymer (oligomer) having at least three monomer repeat units and at least one silyl ether group, in the presence of an anion catalyst, with a terminally unsaturated acyl fluoride or sulfonyl fluoride.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Gordon M. Cohen
  • Low-firing dielectric composition
    Patent number: 4845062
    Abstract: A composition for the preparation of low-firing dielectric layers comprising an admixture of finely divided particles of:(a) MgTiO.sub.3 ;(b) 0-10% wt., basis total solids, CaTiO.sub.3 ;(c) 5-10% wt., basis total solids, zinc borate frit in which the atomic ratio of zinc to boron is 1-3, the frit containing 0-5% wt., basis total solids, BaO, and in which up to 50 mol % of the B.sub.2 O.sub.3 is replaced by Al.sub.2 O.sub.3 ;(d) 0-5% wt., basis total solids, of a barium compound selected from BaCO.sub.3, BaTiO.sub.3 and mixtures thereof; and(e) an amount of a divalent metal oxide or precursor thereof selected from MgO, CaO, ZnO and mixtures thereof in an amount approximately molarly equivalent to the amount of BaTiO.sub.3 in the composition, the total amount of Ba in the composition, calculated as BaO, being 1-5% wt. of the total solids, the solids being free of Pb-, Bi- and Cd-containing compounds.
    Type: Grant
    Filed: October 19, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ian Burn
  • Blowout preventer
    Patent number: 4844406
    Abstract: A blowout preventer for use on wellheads for sealing around tubing strings, polished rods, and wirelines, including a body having a bore therethrough and connectable on a wellhead, integral laterally opposed side chambers in the body, a closure cap over each of the side chambers, an operating screw through each of the closure caps, a seal assembly in each of the side chambers adapted to come together in the bore of the body to seal off flow through the body, each of the seal assemblies including a ram plate having only an upper backup plate and side retainer walls, and an elastic seal supported on each ram plate below the backup plate inside the retainer walls, adapted to compress together within the ram body bore for expanding and extruding sufficiently to fully seal off the bore through the body.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: July 4, 1989
    Assignee: Double-E Inc.
    Inventor: James A. Wilson
  • System for converting heat to kinetic energy
    Patent number: 4843824
    Abstract: A system for converting heat to kinetic energy, the system characterized by a fluid driven motor responsive to an introduction of high pressure fluid for driving a selected power train, and a pressure generator for introducing the high pressure fluid to the motor. The pressure generator includes a plurality of boiler tubes for receiving low pressure fluid, a fire box for successively transferring heat to the boiler tubes, and a pressure equalizer for incrementally equalizing pressures within the boiler tubes, whereby an introduction of low pressure fluid, followed by an efficient conversion to a high pressure fluid, is facilitated within the system.
    Type: Grant
    Filed: March 10, 1986
    Date of Patent: July 4, 1989
    Assignees: Dorothy P. Mushines, Sandra E. Banker, Gerald M. Mushines
    Inventor: Anthony Mushines
  • Table tennis ball serving device
    Patent number: 4844458
    Abstract: A portable, automatic serving device for table tennis is provided which includes a robot server and ball capture net. The robot includes a serving head which is mounted for rotation with respect to the body along a plurality of axes. The head is provided with balls from a passageway in the robot operatively connected between the head and the base of the robot. A collapsible net is provided for capturing balls returned by a player. The robot is positioned within and cooperates with the net so that return balls are fed automatically to the head. The robot is operated by three motors, which may be controlled individually to serve sequentially a plurality of balls to a player for practice or for sport. The robot construction provides for a variety of ball delivery techniques, all of which are controlled simply during operation.
    Type: Grant
    Filed: April 3, 1985
    Date of Patent: July 4, 1989
    Assignee: Joseph E. Newgarden
    Inventors: Gary Gatchel, Joseph E. Newgarden, Gordon E. Lynn
  • Polyoxymethylene/polyurethane compositions containing polycarbodiimide
    Patent number: 4845161
    Abstract: Polyoxymethylene/thermoplastic polyurethane compositions having 5-40 weight percent polyurethane are modified by incorporating therein 0.05-1.0 weight percent of a polycarbodiimide (or a mixture of polycarbodiimides) having a molecular weight of about 1000 and containing units of the formula ##STR1## where n has an average value of about 3, to improve resistance to discoloration and decomposition.
    Type: Grant
    Filed: November 23, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul N. Richardson
  • Herbicidal sulfonamides
    Patent number: 4844727
    Abstract: Sulfonylureas with uniquely substituted heterocycles demonstrate activity as agricultural chemicals.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas R. Dean
  • Esterified dietary fiber products and methods
    Patent number: 4844924
    Abstract: A dietary fiber material, e.g. corn bran, having improved color stability is provided. The material is esterified prior to bleaching to decrease the color of the material. Typical dietary fiber materials are the fiber materials produced by the milling of plant seeds such as cereal grains and oilseeds. The esterification of the dietary fiber material corn bran prior to bleaching results in a lighter colored dietary fiber product having enhanced acceptance as a dietary fiber supplement in a variety of food products.
    Type: Grant
    Filed: September 16, 1987
    Date of Patent: July 4, 1989
    Assignee: A. E. Staley Manufacturing Company
    Inventor: Keith D. Stanley
  • Cristobalitic shell-mould for casting, the products and the process used for preparing the said mould
    Patent number: 4844148
    Abstract: An aqueous bath or slurry for use in forming a shell mould, comprising from 20 to 40 wt. % of colloidal silica, from 20 to 40 wt. % of finely ground zircon, from 15 to 25 wt. % of silica sand, from 15 to 35 wt. % of finely ground fused silica, and from 1 to 5 wt. % of finely ground cristobalite. The shell-mould is made by repeatedly dipping a wax model into the bath or slurry to form a coating of the desired thickness, and then thermally treating the shell-mould so formed by placing the mould into an oven, heating the oven to a temperature between 1050.degree. C. and 1200.degree. C., maintaining the temperature for a period of between 1 and 2 hours, and then allowing the oven and mould to cool to ambient temperature. The mould obtained contains from 10 to 30 wt. % of cristobalite at ambient temperature.
    Type: Grant
    Filed: November 16, 1987
    Date of Patent: July 4, 1989
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "S. N. E. C. M. A."
    Inventors: Thierry A. Cuisin, Jean-Noel E. Dody, Jean-Pierre Flochel
  • Thermoplastic elastomeric blends
    Patent number: 4843124
    Abstract: A thermoplastic elastomer blend of 15-90 parts of a continuous matrix of a thermoplastic elastomeric copolyester having a melting point of 100.degree.-200.degree. C. and 10-85 parts of crosslinked polychloroprene present in the form of finely divided particles.
    Type: Grant
    Filed: June 3, 1987
    Date of Patent: June 27, 1989
    Assignee: E. I. Du Pont de Neumours and Company
    Inventor: James R. Wolfe, Jr.
  • Spinning pack design
    Patent number: 4842503
    Abstract: An apparatus for spinning includes a polymer inlet zone and a spinneret assembly. A first metering pump for pumping a first set of molten polymer streams of equal flow rate to the polymer inlet zone and a second metering pump for pumping a second set of two molten polymer streams of equal flow rate to the polymer inlet zone are provided. The second pump having twice the capacity of the first pump. The spinneret assembly comprises a pair of spinnerets interchangeably locatable in the spinning pack. One of the spinnerets is adapted to combine the first set of streams to produce three ends of filaments and the other of the spinnerets is adapted to combine each of the first streams with a respective one of the second streams to provide two ends of filaments.
    Type: Grant
    Filed: October 24, 1988
    Date of Patent: June 27, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ronald J. Judge
  • Circuit board substrate with gold plated contact elements and a method for mounting gold plated contact elements to the substrate
    Patent number: 4843190
    Abstract: Method of mounting refined contact surfaces on a substrate and substrate provided with such contact surfaces.A method for mounting contact surface elements on the ends of strip conductors along the edge of a substrate. A solder mixed with adhesive is applied to the soldering surface at ends of the strip conductors. Contact surfaces each having a refined, f.i. gold plated, top surface and an activated, f.i. tin plated, bottom surface, are placed respectively on each soldering surface. Heat is applied to melt the solder particles and provide a good electrical connection between each surface contact and strip conductor. The substrate mounted with the contact elements has a plurality of components mounted on one surface thereof and interconnected by the strip conductors. The substrate is adapted to be plugged into an edge connector along its edge with the mounted contact surface elements.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: June 27, 1989
    Assignee: E. I. DuPont De Nemours and Company
    Inventor: Laurentius M. Verhoeven
  • Phenyl-substituted sulfonamides
    Patent number: 4842639
    Abstract: This invention relates to novel condensed ring sulfonylureas and their use as herbicides and growth regulants.
    Type: Grant
    Filed: September 25, 1986
    Date of Patent: June 27, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert J. Pasteris
  • Shielded access apparatus for use in an enclosure for preventing propagation of electromagnetic energy into or out of the enclosure
    Patent number: 4841692
    Abstract: A shielded access apparatus for enabling personnel access to an enclosure which is shielded to prevent propagation of electromagnetic energy into and out of the enclosure. The apparatus includes an access enclosure of electrically conductive material and first and second openings in the enclosure. A shield is positioned in the enclosure between the first and second openings for preventing radiated electromagnetic energy passing through one of the openings from travelling along a straight line to the other opening. Absorption material lines the interior of the enclosure and absorbs radiated electromagnetic energy passing through the enclosure.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: June 27, 1989
    Assignees: Donald N. Coupard, Andrew K. Chang, John E. Fuller, Angelo J. Mauriello
    Inventors: Donald N. Coupard, Andrew K. Chang, John E. Fuller, Angelo J. Mauriello
  • Glyphomicins A and B
    Patent number: 4842857
    Abstract: Cultivation of a strain of the microorganism Micromonospora sp. A.T.C.C. No. 53481, yields the novel antibiotic substance glyphomicin, which is a mixture of glyphomicin A and glyphomicin B.
    Type: Grant
    Filed: May 12, 1986
    Date of Patent: June 27, 1989
    Assignee: E. R. Squibb and Sons, Inc.
    Inventors: Edward Meyers, William L. Parker
  • Process for the manufacture of 1,1,1-trifluorodichloroethane and 1,1,1,2-tetrafluorochloroethane
    Patent number: 4843181
    Abstract: An improved gas-phase process for the manufacture of 1,1,1-trifluorodichloroethane and/or 1,1,1,2-tetrafluorochloroethane by contacting a suitable tetrahaloethylene and/or pentahaloethane with hydrogen fluoride in the presence of Cr.sub.2 O.sub.3, prepared by pyrolysis of (NH.sub.4).sub.2 Cr.sub.2 O.sub.7, the reaction being conducted under controlled conditions whereby the production of pentafluoroethane is minimized.
    Type: Grant
    Filed: October 22, 1987
    Date of Patent: June 27, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William H. Gumprecht, Leo E. Manzer, V. N. Mallikarjuna Rao