Patents Assigned to E
  • Low-melting tetrafluoroethylene copolymer
    Patent number: 6197904
    Abstract: Copolymers of tetrafluoroethylene and ethylene having modifiers comprising perfluoro(alkyl vinyl ether) have low melting points. The copolymers also have low flex modulus.
    Type: Grant
    Filed: February 2, 1999
    Date of Patent: March 6, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Subash V. Gangal, Dewey L. Kerbow, Robert G. Brown, Patrick E. Lindner, Scot David Pedersen
  • Feeding carded fiber to an airlay
    Patent number: 6195842
    Abstract: A process of feeding carded fiber to an airlay and particularly to combining carding technology with airlay technology. A carding machine portion is arranged to card fiber while a disperser-roll in the airlay portion picks the individualized carded fibers from a tool bed roll and centrifugally doffs them into an air stream. As such, airlays will be able to handle longer fiber lengths which conventional airlay equipment is unable to handle or satisfactorily open up. Further, an improved process for doffing fiber from a airlay machine and particularly centrifugally doffing fiber from a carding machine.
    Type: Grant
    Filed: December 3, 1996
    Date of Patent: March 6, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kenneth Stephen Freund, Andrew James Giles, Todd Arden McCoy, Lyles Howard Sowell, Phillip Osborne Staples, Leonard Ray Tucker, James Stephen Bailey
  • Polyacetal composition with improved toughness
    Patent number: 6194515
    Abstract: To provide a polyacetal composition with improved toughness, wear resistance, and flowability. The polyacetal composition contains 100 wt % of polyacetal and 0.5-5 wt % of a block copolymer, which has its central portion made of an amorphous polymer that forms an elastic domain at room temperature and which has polyethylene glycol chains with molecular weight of 2000 or higher at its two ends.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Kenichi Shinohara, Edmund Arthur Flexman
  • Fiberoptic reflective variable attenuator and on-off switch
    Patent number: 6195479
    Abstract: A polarization-insensitive fiberoptic reflective variable aftenuator and on-off switch is provided. The device has a sleeve holding a pair of optical fibers, a first, second and third birefringent crystals, a collimating GRIN lens, a liquid crystal cell and a mirror element. The first birefringent crystal is fixed over an end facet of one of the optical fiber pair, and the second and third birefringent crystals are fixed over an end facet of the other of the optical fiber pair. The GRIN lens has a first end face proximate the first, second and third birefringent crystals and the liquid crystal cell is located between the mirror element and a second end face of the GRIN lens. Responsive to preselected voltages applied to its electrical terminals, the liquid crystal cell is in a first state or a second state.
    Type: Grant
    Filed: June 28, 1999
    Date of Patent: February 27, 2001
    Assignee: E-Tek Dynamics, Inc.
    Inventor: Jing-Jong Pan
  • Photosensitive ceramic compositions containing polycarbonate polymers
    Patent number: 6194124
    Abstract: The invention is directed to polymer comprising the repeat unit wherein each of R1 through R7 are independently hydrogen or alkyl, and R8 is hydrogen or methyl. The invention is further directed to a photosensitive composition comprising an admixture of: (a) finely divided particles if inorganic solids selected from the group consisting of ceramic, metal, metal oxide or metal alloy; (b) finely divided particles of an inorganic binder having a glass transition temperature in the range of form 550 to 825° C. a surface area to weight ratio of no greater than 10 m2/g and at least 95 wt. % of the particles having a size of 1-10 &mgr;m, dispersed in an organic vehicle comprising; (c) polymer as recited herein above; (d) photoinitiation system; (e) organic medium. With removal of the organic medium the above composition can be utilized for a tape.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John Haetak Choi, Neville Everton Drysdale
  • Air handling system for an advanced web former
    Patent number: 6193174
    Abstract: An apparatus for distributing fiber from a carding machine to an airlay wherein the apparatus comprises a system of ducts or conduits for controlling air flow having a curved top wall and a curved bottom wall that define a converging passageway and the distance between the walls is defined by an exponential equation.
    Type: Grant
    Filed: June 22, 1999
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Phillip Osborne Staples, Kenneth Stephen Freund, Andrew James Giles
  • Gem-dihydropolyfluoroalkanes and monohydropolyfluoroalkenes, processes for their production, and use of gem-dihydropolyfluoroalkanes in cleaning compositions
    Patent number: 6194619
    Abstract: A catalyic process is disclosed for producing fluorine-substituted hydrocarbon products of the formulae RCH2CF2R and RFC═CHR at an elevated temperature, from compounds of the formula RCHFCHFR, where each R is independently selected from the group consisting of —CF3, —CF2CF3 and —CF2CF2CF3 or where both R groups of a formula together are —(CF2)2—, —(CF2)3— or —(CF2)4—. Suitable catalysts include carbon catalysts and catalysts containing at least one compound of a selected metal (e.g., Na, K, Rb, Cs, Y, La, Ce, Pr, Nd, Sm, Cr, Fe, Co, Rh, Ni, Cu, and/or Zn) supported on carbon. The saturated gem-dihydro- products may also be produced by hydrofluorinating the corresponding olefinic product over such catalysts at an elevated temperature, and can be combined with various other miscible solvents to form compositions useful for cleaning.
    Type: Grant
    Filed: September 10, 1993
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: V. N. Mallikarjuna Rao, Frank Julian Weigert, Carl G. Krespan
  • Acousto-optic devices having an acoustic attenuator structure
    Patent number: 6195476
    Abstract: Disclosed is an acousto-optic device having a number of acoustic attenuating structures and a method to limit the parasitic effects of a surface acoustic wave. The structures include any combination of the following: surrounding the acousto-optic conversion region with acoustic absorber, placing acoustic absorber near to the transducer(s), placing a strip of acoustic absorber between optical waveguides formed in the device, shaping one or more ends of acoustic waveguides formed in the device to absorb energy from the transducer(s), and/or extending the acoustic waveguides to further limit irradiation of unguided acoustic waves.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: February 27, 2001
    Assignee: Pirelli Cavi e Sistemi S.p.A.
    Inventor: Steffen Schmid
  • Device for positioning and cutting the film in the packaging station of a machine for packaging with stretchable film
    Patent number: 6192662
    Abstract: The blade (12) which is to make the transverse cut of the film in the product packaging station is fixed in the lower part of the grooved section (11) which forms part of the front folder (9) of the packaging machine and has its cutting edge facing downwards. The film to be cut (102) is raised against this blade by a parallel grooved bar (13) with rounded and preferably staggered edges, which in an intermediate phase before its own working travel is also used to raise the section of the film which will have to be cut subsequently, to dispose the film in the correct position for gripping by the lateral grippers (6) of the packaging machine. The said film raising bar is preferably driven by means of a link block, by and electric motor (22) with electronic rotation speed and phase control, controlled by the processor of the packaging machine.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: February 27, 2001
    Assignee: A.W.A.X. Progettazione E Ricerca S.R.L.
    Inventors: Renato Rimondi, Angelo Cappi
  • Method for transport and/or storage of live baits, process for preparing artificial muddy sand used for transport and/or storage of live baits and container for live baits
    Patent number: 6193902
    Abstract: This invention aims to provide a method for transport and/or storage of live baits adapted to alleviate a lose occurring in the course of transport and/or storage and to maintain a freshness of the live baits for a long period. The method according to the invention comprises making artificial muddy sand used to transport and/or store live baits. The method comprises the steps of: immersing paper products in artificial seawater to fibrillate the paper products; preparing a mixture of plants cellulose fiber of the paper product fibrillated in the artificial seawater and muddy sand of the live baits' native seashore; and forming granular artificial muddy sand containing an amount of seawater from the mixture.
    Type: Grant
    Filed: August 1, 1999
    Date of Patent: February 27, 2001
    Assignee: E & T Kabushiki Kaisha
    Inventor: Tetsu Eguchi
  • Facile method for identifying regulated promoters
    Patent number: 6194159
    Abstract: A new method for the identification of useful promoters is disclosed. The method is capable of identifying bacterial promoters sensitive to a particular cellular insult and may be modified to identify promoters sensitive to herbicides and crop protection chemicals. Constructs comprising promoters upstream of a luminescent reporter genes are placed in transformed hosts. Transformants grown in liquid media to a predetermined growth stage and contacted with a cellular insult are assessed for regulatory region activity by measurement of the resulting change in bioluminescence. The method is able to identify promoters undetectable by standard methods.
    Type: Grant
    Filed: November 24, 1999
    Date of Patent: February 27, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Robert Alan LaRossa, Tina Kangas Van Dyk
  • Constructive module of an electronic telecommunications equipment, with an interface towards a testing and diagnosing system
    Patent number: 6194909
    Abstract: An electronic telecommunications module has circuit components and conductors forming a telecommunications circuit having insertion points at which signals can be applied for test purposes and monitoring points from which responses can be tapped. The insertion and monitoring probes are mounted on the module and are connected to the respective points by shielded microcoaxial cables and the probes are connected by shield and microcoaxial cables on the connectors to allow interfacing between the particular module and the testing and diagnostic system.
    Type: Grant
    Filed: August 5, 1998
    Date of Patent: February 27, 2001
    Assignee: Cselt- Centro Studi E Laboratori Telecomunicazioni S.p.A.
    Inventors: Piero Belforte, Flavio Maggioni
  • Polyamides having improved color and processibility and process for manufacturing
    Patent number: 6191251
    Abstract: Incorporation of certain phosphorus compounds in conjunction with certain bases into a polyamide melt or a polyamide manufacturing polymerization process results in a polyamide having improved color properties.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Rolando Umali Pagilagan
  • Grafting of polymers with fluorocarbon compounds
    Patent number: 6191231
    Abstract: Fluorine containing terminal olefins may be grafted onto polymers containing hydrogen bound to carbon in the presence of free radicals. The olefins may also contain other functional groups. The resulting novel grafted polymers are useful as molding resins, for coating and as catalysts.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: February 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Neville Everton Drysdale, Lin Wang, Zhen Yu Yang
  • Hydroperoxide decomposition processes
    Patent number: 6191311
    Abstract: An improved process for decomposing alkyl or aromatic hydroperoxides to form a decomposition reaction mixture containing the corresponding alcohol and ketone. The improvement relates to decomposing the hydroperoxide by contacting the hydroperoxide with a catalytic amount of a heterogeneous catalyst of Nb or Hf hydroxide or oxide. The improvement also relates to decomposing a secondary hydroperoxide by contacting the secondary hydroperoxide with a catalytic amount of a heterogeneous catalyst of Zr or Ti hydroxide or oxide. The catalysts may optionally be supported on SiO2, Al2O3, carbon or TiO2.
    Type: Grant
    Filed: March 25, 1999
    Date of Patent: February 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joe Douglas Druliner, Norman Herron
  • Optical telecommunications system
    Patent number: 6191854
    Abstract: Optical telecommunications system, comprising: a transmitting station capable of emitting an optical signal having a power of between 18 and 30 dBm; an optical fibre transmission line capable of transmitting the said optical signal, comprising dispersion shifted fibre with a length of between 100 km and 1000 km; an optical receiving station, capable of receiving the said optical signal; which comprises, between the said transmission line and the said optical receiver, a chromatic dispersion compensator. Preferably the said optical fibre transmission line has a length of between 200 and 400 km.
    Type: Grant
    Filed: June 23, 1998
    Date of Patent: February 20, 2001
    Assignee: Pirelli Cavi e Sistemi S.p.A.
    Inventors: Giorgio Grasso, Aldo Righetti, Paolo Ottolenghi, Fabio Donati
  • Abrasive filaments of plasticized polyamides
    Patent number: 6190769
    Abstract: The monofilament of this invention is a polyamide of polyhexamethylene adipamide oriented from 1.0-4.0 times its original length, has a diameter of 400-1600 microns and contains 2-20% by weight, based on the weight polyamide of the monofilament, of an alkyl aryl sulfonamide plasticizer and 5.0-40.0% by weight, based on the weight of the monofilament, of abrasive particles having a particle size of 10-400 microns. These monofilaments are particularly useful as bristles used in brushes that are operated under dry conditions at relatively high temperatures.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: February 20, 2001
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Teh-Chuan Wang
  • Multi-channel regenerative pump
    Patent number: 6190119
    Abstract: A turbine impeller pump assembly includes a rotating shaft and inboard and outboard casing members coupled together with each having cavity channels, and an annular recess, and an axial opening to receive the rotating shaft. Inboard and outboard liner members are structurally arranged to be received by the annular recesses in the casing members and an impeller member is positioned between the liner members and keyed for rotation with the shaft. The inboard and outboard liner members each have at least two flow channels structurally arranged to cooperate with the cavity channels to provide equal and opposite pressures on the impeller to maintain the impeller in alignment with respect to the liner members.
    Type: Grant
    Filed: July 29, 1999
    Date of Patent: February 20, 2001
    Assignee: Roy E. Roth Company
    Inventors: Peter P. Roth, Bruce C. Wright, Paul E. Roth
  • Foot bed for a sandal
    Patent number: D437990
    Type: Grant
    Filed: October 27, 1998
    Date of Patent: February 27, 2001
    Assignee: E. S. Originals, Inc.
    Inventor: Terrence Hooper
  • Golf putter head
    Patent number: D438273
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: February 27, 2001
    Assignee: Bruce E. Sizemore, Jr. Golf Design, LLC
    Inventor: Bruce E. Sizemore, Jr.