Patents Assigned to E
  • Photographic enlarger alignment tool and method for aligning a photographic enlarger
    Patent number: 5025568
    Abstract: An improved photographic enlarger alignment tool is disclosed comprising a base plate and a circular level adjustably attached to the base plate by three or more screws adapted to permit calibration of the device in all axes of a plane and alignment of a second plane in all axes simultaneously. A method for using the tool to align the planes of a photographic enlarger is also disclosed.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: June 25, 1991
    Assignee: E. Philip Levine, Inc.
    Inventor: Steven K. Grimes
  • Living cationic polymerization of vinylic unsaturated compounds
    Patent number: 5026799
    Abstract: This invention relates to a process for the living cationic polymerization of vinylic unsaturated monomers in the presence of halogenated aliphatic acids and the zinc salts of halogenated aliphatic acids.
    Type: Grant
    Filed: May 30, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas L. Heitz, Young H. Kim
  • Process for making preshrunk size-free denim
    Patent number: 5025537
    Abstract: Denim fabric having warp yarns containing cotton and high shrinkage synthetic staple fiber is desized, preshrunk and compressively shrunk.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Green
  • Moisture sealing of optical waveguide devices with doped silicon dioxide
    Patent number: 5026135
    Abstract: Optical waveguide devices have improved barrier properties after having been coated with silicon dioxide doped with certain metals.
    Type: Grant
    Filed: April 20, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Bruce L. Booth
  • High strength fiber or film of aromatic copolyamide with pendant carboxyl groups
    Patent number: 5026819
    Abstract: The reactivity of aromatic copolyamide fiber and film is enhanced by incorporation of small amounts of 4,4'-diaminodiphenic acid units in the polymer chain.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert S. Irwin
  • Azeotropic compositions of perfluoro-1,2-dimethylcyclobutane with methanol and 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane
    Patent number: 5026497
    Abstract: Azeotropic mixtures of perfluoro-1,2-dimethylcyclobutane, methanol and either 1,1-dichloro-1-fluoroethane or dichlorotrifluoroethane, are useful in solvent cleaning applications, and as refrigerants, aerosol propellants and polymer blowing agents.
    Type: Grant
    Filed: March 12, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Abid N. Merchant
  • Aramid papers containing aramid paper pulp
    Patent number: 5026456
    Abstract: An aramid paper which has high porosity while exhibiting the usual tensile properties is disclosed. The paper has good saturability and a smooth surface while retaining high break strength.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lee J. Hesler, Stanley C. Park
  • Gas-phase fluorination process
    Patent number: 5026930
    Abstract: An improved gas-phase process for the manufacture of 1,1-difluoro-1,2-dichloroethane and/or 1-fluoro-1,1,2-trichloroethane by contacting a suitable trihaloethylene and/or a tetrahaloethane with hydrogen fluoride in the presence of a metal in combination with a high fluorine content aluminum-containing compound, the reaction being preferably conducted under controlled conditions whereby the production of 1,1,1-trifluorochloroethane is minimized.
    Type: Grant
    Filed: January 16, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Leo E. Manzer, V. N. Mallikarjuna Rao
  • Staple fibers and process for making them
    Patent number: 5026603
    Abstract: Staple fibers having a crimp frequency in the range of 3 to 6 crimps per centimeter are mae by a process including a co-crimping step in which conductive and nonconductive filaments are crimped together.
    Type: Grant
    Filed: November 8, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David J. Rodini
  • Board mounted connector system
    Patent number: 5026291
    Abstract: A board mounted connector system for interconnecting the planar pads disposed in an area array on a surface of a board includes (a) a modular connector, (b) a frame, and (c) securing means for securing the connector within a predetermined distance of the surface of the board. The frame may be mounted to either side of the board.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James J. David
  • Clamping systems for two piece ostomy device
    Patent number: 5026360
    Abstract: To minimize trauma after surgery, a clamp is employed to sealingly engage specially configured coupling rings mounted on the adhesive faceplate and the collection pouch, respectively. Each of the coupling rings includes a radially extending annular projection. The circular clamp is designed to surround the coupling rings and receive the projections within an annular recess. The projections and recess have oppositely oriented camming surfaces which cooperates to draw the coupling rings toward each other as the clamp is tightened. The clamp is locked by a toggle clasp connected by a living hinge, a pin and socket arrangement, a serrated clasp or a change purse type clasp. An adaptor can be employed so that the clamp can be used with a pouch with a conventionally configured coupling ring.
    Type: Grant
    Filed: September 18, 1990
    Date of Patent: June 25, 1991
    Assignee: E. R. Squibb & Sons
    Inventors: Kenneth A. Johnsen, Walter F. Leise, Jr.
  • Process for direct isolation of captopril
    Patent number: 5026873
    Abstract: A process is disclosed for direct isolation of captopril from a substrate of the formula ##STR1## wherein R is lower alkyl or lower alkoxy. In this process, the substrate is first treated with an aqueous alkali metal hydroxide capable of forming a water-soluble salt of the substrate, wherein the alkali metal hydroxide has a concentration of 4M or greater. The substrate is then neutralized, preferably with a mineral acid. By this process, captopril may be directly crystallized from an aqueous solution, avoiding the prior art use of organic solvents and zinc treatment to reduce levels of sulfide and disulfide impurities, respectively. In an alternative embodiment, neutralization is carried out by use of a hydrogen-supplying ion exchange resin.
    Type: Grant
    Filed: November 6, 1989
    Date of Patent: June 25, 1991
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Neal G. Anderson, David A. Lust, Barbara J. Bennett, Alan F. Feldman, Robert E. Polomski
  • Process for making pigmented ink jet inks
    Patent number: 5026427
    Abstract: In accordance with this invention there is provided a process for the preparation of pigmented ink jet inks comprising:(a) mixing at least one pigment and at least one pigment dispersant in a dispersant medium to form a pigmented ink mixture wherein pigment is present in an amount up to 60% by weight based on the total weight of the mixture;(b) deflocculating the pigmented ink mixture by passing the pigmented ink mixture through at least a plurality of nozzles within a liquid jet interaction chamber at a liquid pressure of at least 1,000 psi to produce a substantially uniform dispersion of pigment particles in the dispersant medium.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: June 25, 1991
    Assignee: E. I. DuPont de Nemours and Company
    Inventors: Robert D. Mitchell, Torence J. Trout
  • Process for regioselectively preparing phosphorylated inositols and other cyclitols
    Patent number: 5026898
    Abstract: A process for regioselectively preparing phosphorylated cyclitols, in particular phosphorylated inositols such as myo-inositol 1,4,5-tris(phosphate) and muo-inositol 1,3,4,5-tetrakis(phosphate). Novel cyclitols produced by means of this process are also described.
    Type: Grant
    Filed: January 31, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Frank W. Hobbs, James L. Meek
  • Thermally conductive adhesive
    Patent number: 5026748
    Abstract: Adhesive resins are filled with carbon fibers that have a three-dimensional structure. The fibers have variable lengths and widths. The fiber filled adhesive exhibits high thermal conductivity values. Electronic systems having components bonded by a layer of these adhesives resins have high through-the-thickness thermal conductivity.
    Type: Grant
    Filed: May 7, 1990
    Date of Patent: June 25, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Jerome T. Adams, Bruce A. Yost
  • System and circuits for the processing and transmission of a clock signal, in particular of the video synchronization frequency
    Patent number: 5025460
    Abstract: A system for processing and transmitting a clock signal, in particular the video synchronization frequency Fsr, in order to obtain a binary flow with pre-fixed and desired speed, e.g. a flow at 64 Kb/s. The system can survey the jitter of Fsr and determine its value, using this value to suitably condition the information flow at output. In a typical application, this information, together with a video/audio signal, forms four musical channels and, with low speed, flows to the inputs of a circuit that carries out multiplexing at 34368 Kb/s, according to the European standard. This multiplexer operating at 34368 Kb/s can be advantageously used in systems and equipment for the processing of the television signal using mono or bidimensional transformation coding to obtain a high compression of the information to be transmitted.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: June 18, 1991
    Assignee: Telettra-Telefonia Elettronica e Radio S.p.A.
    Inventors: Silvio Cucchi, Stefano Carbone
  • Methods, systems, apparatus and rotor for applying granular material
    Patent number: 5024356
    Abstract: Methods, systems, apparatus and a rotor are provided for metering, conveying and dispensing granular materials and/or liquids. The systems, apparatus and rotor can be used for metering, conveying and dispensing granular materials onto a plurality of zones and/or liquids onto a plurality of regions.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: June 18, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Joseph F. Gerling, Raymond A. Kaczmarczyk, Jr.
  • Dry film process for altering wavelength response of holograms
    Patent number: 5024909
    Abstract: Wavelength response of volume holograms is altered by contact with a dry film diffusion element.
    Type: Grant
    Filed: June 12, 1990
    Date of Patent: June 18, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William K. Smothers, Krishna C. Doraiswamy, Mark L. Armstrong
  • Antistatic lead screens for use with x-ray films
    Patent number: 5025164
    Abstract: An improved intensifying lead screen for use with photographic, industrial X-ray films, having a low propensity to produce electrostatic changes, is described. This screen comprises a lead foil adhesively applied to a polyester support with an overcoat or protective layer applied over the lead layer and coated thereon, a layer of a fluorosurfactant.
    Type: Grant
    Filed: March 7, 1990
    Date of Patent: June 18, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lloyd G. Sidwell, Conrad E. Miller
  • Extrusion isolation of blends of rubber and asphalt
    Patent number: 5025044
    Abstract: Blends of asphalt emulsions or melts and aqueous elastomeric latices are prepared using a screw type extruder adapted to provide sufficient back pressure within the screw flights of the extruder to express the water from the blend through a vent provided in the extruder.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: June 18, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lance A. Christell, Fred Y. Kafka