Patents Assigned to E
  • Melt-fusible co-polyimide from diamine mixture
    Patent number: 4725642
    Abstract: Melt-fusible copolyimides based on pyromellitic anhydride and two defined classes of aromatic diamines, at least one diamine of each class being incorporated into the polyimide, each diamine class being present in an amount of 10-90 mole percent of the total diamine content (100 mole percent), melt below about 400.degree. C. and can be fabricated into articles, or can be applied to either fibrous or nonfibrous substrates to make prepregs, tapes, etc., which then are shaped into final articles, such as printed circuit boards or aircraft panels.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: February 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas P. Gannett, Robert J. Kassal, Rolland S. Ro, Julius Uradnisheck
  • Process for preparing high stength cellulosic fibers
    Patent number: 4725394
    Abstract: High strength, high modulus cellulose triacetate fibers are produced by spinning a 30-50% by weight solution of cellulose triacetate having an acetyl content of at least 42.5% and an inherent viscosity of at least 5 from a solvent mixture comprising nitric acid and another solvent having a molecular weight of less than 160 in a mol ratio of 1-3 through an air gap into a coagulating bath.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: February 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John P. O'Brien
  • Vapor-permeable, waterproof bicomponent structure
    Patent number: 4725481
    Abstract: (A) A continuous layer of a hydrophobic elastomer having a water vapor transmission rate of 400-2500 gm.mil/m.sup.2 /24 hrs.
    Type: Grant
    Filed: February 24, 1987
    Date of Patent: February 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George J. Ostapchenko
  • Cervically adjustable chiropractic treatment table
    Patent number: 4724828
    Abstract: A headpiece and headpiece coupling arrangement to be used in conjunction with a chiropractic treatment table, allowing the practitioner to select any one or more of six different modes of movement of the headrest relative to the main portion of the treatment table is disclosed. In addition to the somewhat conventional pivotal motion about a horizotal axis, the present invention provides the practitioner with pivotal motion about a vertical axis, linear extensin or traction, rotation of the headpiece about a longitudinal axis coinciding with the patient's spinal column, auxiliary flexion of the headpiece about a horizontal axis, and an abrupt limited motion for bringing a patient's head forward and downwardly, imparting a snapping action to the cervical spine. The latter two modes of movement are mechanically linked to the rotation of the headpiece.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: February 16, 1988
    Assignee: James E. Barnes
    Inventors: James E. Barnes, James Morkoetter
  • Machine for cleaning carpets
    Patent number: 4724573
    Abstract: In a carpet cleaning machine with a machine housing (1), two containers (4,5) for fresh and used cleaning liquid respectively and flexible tubing (2,3) connecting the machine housing (1) to at least one liquid ejection nozzle (not shown) and a suction mouthpiece (not shown), each of the two containers (4,5) is removably supported in a space (14) above a substantially horizontal portion (7) of said housing (1) and close to a substantially vertical partition portion (8) of said housing (1), each container preferably being supported by plugs (11) extending outwards and upwards from each side of the partition portion (8) and cooperating with sockets (12) recessed into the sides (10) of the containers adapted to face the partition portion (8).
    Type: Grant
    Filed: January 13, 1987
    Date of Patent: February 16, 1988
    Assignee: Knud E. Westergaard
    Inventor: Karsten Z. Ostergaard
  • Tetrafluoroethylene fine powder and preparation thereof
    Patent number: 4725644
    Abstract: Tetrafluoroethylene fine powder resins are described which have surprisingly high extrusion pressures and molecular weights which make them useful in post-paste extruded stretching operations. The resins are made by using a permanganate polymerization initiator and controlling its rate of addition.
    Type: Grant
    Filed: May 6, 1986
    Date of Patent: February 16, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Satish C. Malhotra
  • Lower alkyl 2-[[N-(3-cyano-pyridin-2-yl)aminocarbonyl]aminosulphonyl]benzoate derivatives having herbicidal activity
    Patent number: 4723991
    Abstract: Certain N-[(pyridyl or pyrimidyl)aminocarbonyl]arylsulfonamides, such as the compound methyl 2-[[N-(3-cyano-4,6-dimethylpyridin-2-yl)aminocarbonyl]aminosulfonyl]benzoa te, possess herbicidal activity.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Caleb W. Holyoke, Jr., Chi-Ping Tseng, William T. Zimmerman
  • Herbicidal sulfonamides
    Patent number: 4723987
    Abstract: Sulfonamides such as N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-1,3-dihydro-6-methyl-3-oxof uro[3,4-c]pyridine-4-sulfonamide are useful as herbicides and plant growth regulants.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Mary A. Hanagan
  • Method of making laminated glass
    Patent number: 4724023
    Abstract: A method and apparatus for the laminating of glass is described. Glass sheets are transported by a gantry which places the sheet on a workstation. The glass sheet is allowed to dish and a second sheet is placed over the first sheet after depositing a resin on the first sheet. The trolley and the workstation from a press to complete the lamination process.
    Type: Grant
    Filed: March 19, 1986
    Date of Patent: February 9, 1988
    Assignee: E M Partners AG
    Inventor: Peter H. Marriott
  • Method for making porous bottom-layer dielectric composite structure
    Patent number: 4724021
    Abstract: A method for inhibiting the formation of blisters during the firing of intermediate layers of fired multilayer electronic components comprising the sequential steps of:(1) applying to a substrate a first and second layer of finely divided particles of dielectric solids and glass dispersed in organic medium; and(2) firing the layers to effect volatilization of the organic medium therefrom, liquid phase sintering of the glass components and densification of both layers, the softening point of the glass, the particle size of the glass and the ratio of glass to dielectric solids in both layers being adjusted in such manner that when the layers are fired, the first layer is porous and the second layer is nonporous.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Paul J. Martin, Thomas E. Dueber
  • Herbicidal thiophenesulfonamides
    Patent number: 4723988
    Abstract: Thiophenesulfonamides such as N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-3-(isoxazol-3-yl)-2-thiophen esulfonamide are useful as herbicides and plant growth regulants.
    Type: Grant
    Filed: March 27, 1987
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Rafael Shapiro
  • Multi-boom field sprayer
    Patent number: 4723709
    Abstract: An improved multi-boom field spraying apparatus designed to spray in a sequential manner one or more of a plurality of liquids to a selected spray zone among a number of spray zones is described. The apparatus contains a novel spray, agitate air and rinse system. A novel spray boom and vessel apparatus are also described.
    Type: Grant
    Filed: June 18, 1986
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas A. Curran, Jr., James L. Yager
  • Herbicidal sulfonamides
    Patent number: 4724039
    Abstract: This invention relates to 2-[[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]aminosulfonyl]-4-(difluorom ethoxy)benzoic acid, ethyl ester, agriculturally suitable compositions thereof and methods of its use.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Craig L. Hillemann
  • Production of crystalline fructose
    Patent number: 4724006
    Abstract: This invention describes the production of crystalline fructose from an aqueous dispersion utilizing an alcohol and controlled temperature conditions. The aqueous dispersion is maintained at an elevated temperature of 50.degree. C. to 80.degree. C. and admixed with the alcohol at a weight ratio of 3:1 to 1:3. The alcohol is selected from methanol, ethanol, isopropanol and mixtures thereof and maintained at a temperature between 46.degree. C. and 75.degree. C.
    Type: Grant
    Filed: September 20, 1984
    Date of Patent: February 9, 1988
    Assignee: A. E. Staley Manufacturing Company
    Inventor: Gary A. Day
  • Method and apparatus for loop direction finding with no ambiguity
    Patent number: 4724442
    Abstract: A method and apparatus is provided for deriving the direction of a received signal from a signal source using first and second orthogonally-mounted loop antennas and an omnidirectional antenna. In operation, output signals from each of the antennas are generated and repeatedly supplied to signal processing circuitry in a cyclical fashion as the receiver is rotated to locate the transmitter. The amplitudes of the output signals from the first and second loop antennas are then compared to determine whether the signal source is located in a null of the second loop antenna. If so, a null indication signal is generated. The phases of the output signals from the second loop antenna and the omnidirectional antenna are compared to determine whether the received signal is being received in a predetermined region of the second loop antenna. If so, an ambiguity indication signal is generated.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: February 9, 1988
    Assignee: E-Systems, Inc.
    Inventor: Dennis D. King
  • Herbicidal sulfonamides
    Patent number: 4723990
    Abstract: o-Haloalkylbenzene sulfonylureas are useful as herbicides.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: February 9, 1988
    Assignee: E. I. DuPont De Nemours and Co.
    Inventor: William B. Farnham
  • Pin plug and socket connector using insulation displacement contacts
    Patent number: 4723916
    Abstract: A circular pin plug and socket connector has a conductor support block with a central axial bore therethrough and with a plurality of grooves extending radially from the bore. A cable having a plurality of conductors is received through the bore, with the conductors in the cable flaring radially into an individual ones of the grooves. The grooves are arranged to receive and to orient the individual conductors of the cable along a predetermined presentment angle. Each groove has a pair of slots associated therewith. The slots are sized to receive the tines of insulation displacement contact. The slots are arranged on a circular locus centered on the axis of the bore.
    Type: Grant
    Filed: October 23, 1986
    Date of Patent: February 9, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David F. Fusselman, Timothy A. Lemke
  • Electric automotive fuel heating system
    Patent number: 4723065
    Abstract: A fuel preheating system for an internal combustion engine wherein a preheater includes a body member having defined therein a pair of serially connected, generally parallel bores defining a flow passages through which a flow of fuel may be passed for heating thereof by elongated electric heaters extending within the passages and including a heating element encompassed by helical coils of a heat exchange structure. At least some of the coils of the heat exchange structure define plural tortuous flow paths extending generally axially of the heater.
    Type: Grant
    Filed: July 15, 1985
    Date of Patent: February 2, 1988
    Assignees: Howard E. Meyer, Donald D. Munroe
    Inventor: Howard E. Meyer
  • Process for preparing a photographic emulsion containing tabular grains having narrow size distribution
    Patent number: 4722886
    Abstract: Process for preparing a photographic emulsion containing tabular silver halide grains which have narrow size distribution comprising:A. adding silver nitrate to a vessel containing dispersing medium/bromide mixture, initial bromide ion concentration is 0.08 to 0.25 N to form tabular seed grains;B. adding a basic silver halide solvent, e.g., ammonia, ammoniacal solution, etc. to achieve 0.02 N to 0.2 N of the solvent (e.g., after at least 2% by weight of total silver nitrate has been added);C. stopping silver nitrate addition for 0.5 to 60 minutes, e.g., bromide ion concentration is in the range of 0.005 to 0.05 N;D. neutralizing at least some of the basic silver halide solvent present; andE. adding additional silver nitrate and halide, i.e., Br.sup.- and BrI.sup.-, by balanced double jet procedure.The emulsions are used in photographic elements for x-ray, graphic arts, etc.
    Type: Grant
    Filed: October 10, 1986
    Date of Patent: February 2, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert W. Nottorf
  • Preparation of anhydrous organic acid salts
    Patent number: 4723016
    Abstract: One-step process for preparing anhydrous, organic acid alkali or alkaline earth metal salts by contacting and reacting an organic or polymeric acid fluoride, anhydride or ester and an organic alkali or alkaline earth metal silanolate.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: February 2, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bertrand L. Chenard, Evan D. Laganis