Patents Assigned to I
  • Analysis instrument having a blow molded reaction chamber
    Patent number: 4863693
    Abstract: An analysis instrument is characterized by a rotatable mold ring onto which is drawn superimposed sheets of plastic material. The inner sheet is softened and formed into an indented mold cavity and the outer sheet sealed thereover to define a partially closed sample chamber, or cuvette. A sample to be analyzed is introduced into the chamber. Any of the chambers may have selectively introduced thereinto a suitable reagent and the reaction occurring in any chamber may be selectively monitored at any predetermined circumferential location of the mold ring.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: September 5, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gary W. Howell
  • Filter element and assembly
    Patent number: 4861353
    Abstract: A tubular textile of filamentary poly (tetrafluoroethylene) useful to prolong the mechanical life of a filter material. An assembly for filtering comprising a cage, the tubular filamentary PTFE, and a superjacent filter.
    Type: Grant
    Filed: December 7, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Kurt H. Wyss
  • Co-spun filament within a hollow filament and spinneret for production thereof
    Patent number: 4861661
    Abstract: A hollow fiber which contains within the hollow a co-spun hollow or solid filament. The solid filament is formed of polymer that can distribute energy within the hollow fiber while a co-spun hollow inner filament can also act as a vessel for transportation or separation of fluids. Spinnerets for co-spinning such filaments are of one piece construction.
    Type: Grant
    Filed: January 19, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harry V. Samuelson
  • Preparation of low molecular weight olefinic hydrocarbons using a perovskite catalyst
    Patent number: 4861802
    Abstract: Improved process for the catalytic gas phase preparation of low molecular weight (C.sub.2-6) olefinic hydrocarbons from mixtures of H.sub.2 and CO, the improvement consisting of contacting and reacting a mixture of H.sub.2 and CO, at a H.sub.2 /CO molar ratio within the range 0.3 to 1.5, at a space velocity of 1 to 100 minutes.sup.-1, at a pressure of 1 to 2000 psia (6.894 kPa to 13.788 MPa), at a temperature within the range 200.degree. to 400.degree. C., in the presence of the catalyst of the empirical formula AB.sub.1-a Fe.sub.a O.sub.3, wherein A, B and a are defined herein, for example, LaFeO.sub.3.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Elrey L. McCann
  • Wound rotor element and centrifuge fabricated therefrom
    Patent number: 4860610
    Abstract: A centrifuge rotor is fabricated of a stacked plurality of tiers where each tier is formed from a stacked array of wound arms. Each arm is formed from an array of layered turns of anisotropic fibers having parallel side portions connected through curved end turn portions.
    Type: Grant
    Filed: January 27, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter Popper, William E. Velvel
  • Herbicidal acetals and ketals
    Patent number: 4861366
    Abstract: Novel furan- and thiophenesulfonamides such as 3-(1,3-dioxolan-2-yl)-N-[(4-methoxy-6-methyl-1,3-5-triazin-2-yl)aminocarbo nyl]-2-thiophenesulfonamide and N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-3-(1, 3-dioxolan-2-yl)-2-thiophenesulfonamide are highly active pre-emergent and/or post-emergent herbicides.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Human immunodeficiency virus antigen
    Patent number: 4861707
    Abstract: A recombinant peptide displaying the antigenicity of Human Immunodeficiency Virus (HIV) viral antigens is disclosed. The peptide comprises an antigenic segment having about 150 to about 400 amino acids corresponding to at least about 30 amino acids of the C-terminal of the gp120 domain and at least about 120 amino acids of the N-terminal of the gp41 domain.
    Type: Grant
    Filed: February 2, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lucinda A. Ivanoff, Steven R. Petteway
  • Coextrudable adhesive for polystyrene, and products therefrom
    Patent number: 4861677
    Abstract: A blend of ethylene vinyl acetate copolymer, ethylene vinyl acetate copolymer modified by grafting with a comonomer containing pendant acid or acid derivative functionality, and impact-modified polystyrene provides a useful adhesive particularly for bonding polystyrene to gas barrier polymers.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: I-Hwa Lee
  • Improved coextrudable adhesive and products therefrom
    Patent number: 4861676
    Abstract: A blend of ethylene copolymer, ethylene copolymer modified by grafting with a comonomer containing pendant acid or acid derivative functionality, styrene polymer, and alicyclic resin modifier or stabilized rosin ester provides a useful adhesive, particularly for bonding polystyrene to barrier polymers.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: I-Hwa Lee
  • Impedance controlled connector interface
    Patent number: 4861272
    Abstract: A connector interface for electrically mating a multi-row connector with a printed circuit board is defined by a flex circuit in the form of laminated polyimide layers having conductive traces for each interconnect pair with connection fields at the opposite ends of the traces for electrical connection to the terminal pins on the connector and the conductive pads or pins on the circuit board. The conductive traces are all of equal length to provide equal resistance and impedance paths for each of the circuit interconnects.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Stephen L. Clark
  • Cable plow chute
    Patent number: 4861195
    Abstract: A cable guiding chute assembly suitable for attachment to a vibratory plow blade to dispense a cable at a selected drop radius. The cable chute assembly includes a pair of generally vertical side wall members joined by a forward wall to define a cable passageway and interchangeable gate members extending the length of the passageway to define cable guiding conduits having different radii. Each gate member is releasably secured to the side walls of the chute to permit expeditious removal and replacement. Further, the chute assembly is constructed with minimal surface area to reduce drag and a leading edge to reduce the build-up of material between the chute and plow blade. Moreoever, the chute assembly includes a downwardly directed bottom opening which permits pulling of the cable when the plow blade is removed from the ground without damaging the cable exterior.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: August 29, 1989
    Assignee: J. I. Case Company
    Inventors: Randy H. Hillard, Robert G. Draney, Joseph J. Lesher
  • 4-quinoline carboxylic acid derivatives useful for treating skin and muco-epithelial diseases
    Patent number: 4861783
    Abstract: Phenylquinolinecarboxylic acids and derivatives thereof, such as 2-(2'-Fluoro-1,1'-biphenyl-4-yl)-6-fluoro-3-methyl-4-quinolinecarboxylic acid, or a sodium or potassium salt thereof, are useful for the treatment of skin and muco-epithelial diseases.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Neil R. Ackerman, Richard R. Harris, Scott E. Loveless, Russel H. Neubauer
  • Pitch carbon fibers and batts
    Patent number: 4861653
    Abstract: Mesophase pitch centrifugally spun as described over a lip yields upon stabilization and carbonization with or without graphitization carbon fibers with a lamellar microstructure.
    Type: Grant
    Filed: September 2, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Robert G. Parrish
  • Toughened thermoplastic polyarylate-polyamide compositions
    Patent number: 4861828
    Abstract: Thermoplastic polyarylate-polyamide compositions optionally including an elastomeric modifier show improved notched Izod toughness with the further inclusion of a small quantity of polycarbodiimide.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Marion G. Waggoner
  • Polymerization of fluoroolefins
    Patent number: 4861845
    Abstract: The polymerization of fluoromonomers can be accomplished without fouling by using gaseous monomers in the presence of at least one nonvolatile initiator and by recycling the initiator-free polymerizer gases through an external cooler.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Edgar W. Slocum, Aquiles C. Sobrero, Robert C. Wheland
  • Process for making superconductors using barium nitrate
    Patent number: 4861753
    Abstract: There is disclosed an improved process for preparing a superconducting composition having the formula MBa.sub.2 Cu.sub.3 O.sub.x wherein M is selected from the group consisiting of Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb and Lu; x is from about 6.5 to about 7.0; said composition having a superconducting transition temperature of about 90 K.; said process consisiting essentially of mixing ba(NO.sub.3).sub.2, M.sub.2 O.sub.3 and CuO in an atomic ratio of M:Ba:Cu of about 1:2:3 to form a precursor powder and heating the precursor powder in an oxygen-containing atmoshpere at a temperature from about 875.degree. C. to about 950.degree. C. for a time sufficient to form MBa.sub.2 Cu.sub.3 O.sub.y, where y is from about 6.0 to about 6.4; and maintaining the Mba.sub.2 Cu.sub.3 O.sub.y in an oxygen-containing atmosphere while cooling for a time sufficient to obtain the desired product.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: August 29, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Eugene M. McCarron, III
  • Synthesis of mixtures of butanediols
    Patent number: 4859801
    Abstract: Process for preparing 2-alkyl-1,4-butanediols and mixtures with 1,4-butanediol which comprises bringing together, at an initial alkaline pH, and at a temperature and pressure suitable for reaction, 2,3-dihydrofuran, hydrogen, an unsubstituted aliphatic aldehyde, especially formaldehyde, and a hydrogenation catalyst. Also processes for preparing mixtures of tetrahydrofuran and 3-alkyltetrahydrofuran from the diol mixtures, and copolymers from the tetrahydrofuran mixtures.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: August 22, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard E. Ernst
  • Embedded catalyst receptors for metallization of dielectrics
    Patent number: 4859571
    Abstract: The invention is directed to a laminate for the preparation of printed circuits by electroless plating of conductive metal thereon which comprisesa. an electrically insulative substrate bearingb. an adherent layer of crosslinked polymeric adhesive, which is insoluble in photodielectric developing solutions, having partially embedded therein finely divided particles of adsorbent which protrude from the adhesive surface away from the substrate, the protrusive surfaces of which are adsorptive with respect to electroless plating catalysts or reductive precursors thereof, andc. a solid layer of photodielectric adherently overlying the layer of adhesive and adsorbent particles.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: August 22, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Abraham B. Cohen, Roxy Fan, John A. Quinn
  • Conductive paste composition
    Patent number: 4859364
    Abstract: A conductive paste composition consisting of an admixture of: (a) conductive metal particles having an average particle size of about 0.3 to 1.0 .mu.m; (b) particles uniformly coated with a conductive metal and having an average particle size of not more than 1 .mu.m; and (c) an organic medium, the admixture of particles (a) and (b) being dispersed in the organic medium.
    Type: Grant
    Filed: May 25, 1988
    Date of Patent: August 22, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Yasuo Yamamoto, Akira Inaba, Takashi Kitagaki
  • Process for cleaning enclosed vessels
    Patent number: 4859249
    Abstract: Cleaning process for removing material coated on the inner surface of an enclosed vessel. e.g., photographic emulsion, photopolymer, subbing layer, chemicals, etc., comprisingA. forming a substantially continuous high pressure stream of cleaning liquid, e.g., water, solvent,B. supplying the stream of liquid at a pressure, 4000 to 8000 psi to at least one fixed point in the vessel,C. dividing the stream into at least two opposed paths, andD. directing the liquid onto said surfaces in a 360.degree. solid angle using the fixed point as the angle vertex.The process is particularly useful in cleaning photographic emulsions but is also useful in removing other chemical materials and chemicals from an enclosed vessel.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: August 22, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Jose E. Valentini