Patents Assigned to I
  • Process for the nucleophilic substitution of unactivated aromatic and heteroaromatic substrates
    Patent number: 4783285
    Abstract: The nucleophilic substitution upon unactivated monocyclic or polycyclic aromatic or heteroaromatic substrates bearing suitable leaving groups can be achieved by catalyzing the substitution of said leaving groups by an anionic nucleophile with a cyclic or acyclic polydentate chelating ligand. Specific products of this reaction can be used in preparing sulfonylurea herbicides.
    Type: Grant
    Filed: February 3, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Alden D. Josey
  • Looper to machine for sewing-up netting webs
    Patent number: 4782776
    Abstract: A triple thread chain stitch machine for sewing netting. A knee shaped needle (1) is mounted on a reciprocating bar (2). A stud on the needle is received by the bar (12) for rotation about the stud. A lug (19) on the needle cooperates with a catch (22) to limit needle rotation.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: November 8, 1988
    Assignee: Tsentralnoje Projektno-Konstruktorskoje I Tekhnologicheskoje Bjuro Vsesojuznogo Rybopromyshlennogo Objedinenija Azovo-Chernomorskogo Basseina
    Inventor: Nikolai N. Raikov
  • "Living" polymers and process for their preparation
    Patent number: 4783500
    Abstract: "Living" polymers and their preparation from acrylic-type or maleimide monomers and organosilicon, -tin or -germanium initiators.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Owen W. Webster
  • Vehicle precision location assembly
    Patent number: 4782760
    Abstract: A vehicle precision location assembly including a precision shoe mounted on the vehicle and having planar surfaces which converge towards an end of the shoe and intersect along an edge inclined with respect to the horizontal and a pair of rollers mounted alongside a track and having their axes of rotation canted with respect to each other such that each roller contacts the shoe surfaces along a line substantially parallel to the axis of the roller whereby the vehicle will be centered in a direction transverse to the direction of travel of the vehicle and without any play in the transverse direction regardless of wear.
    Type: Grant
    Filed: August 14, 1986
    Date of Patent: November 8, 1988
    Assignee: S I Handling Systems, Inc.
    Inventors: Peter Rohrbach, Per E. Lindquist
  • Removable bucket tooth assembly
    Patent number: 4782607
    Abstract: Improved means for removably attaching digging teeth to the cutting edge member of an earth-moving bucket. The attachment means includes a pair of clamping means which both apply sandwiching pressure on both the upper and lower surfaces of the edge member to hold the tooth in place against both front and side impacts.
    Type: Grant
    Filed: July 14, 1986
    Date of Patent: November 8, 1988
    Assignee: J. I. Case Company
    Inventors: Claude M. Frisbee, Rudolf Horsch, Victor R. Bowen
  • Quaternaryammonium hydroxide as adjuvant for liquid electrostatic developers
    Patent number: 4783388
    Abstract: Negative-working electrostatic liquid developer having improved charging characteristics consisting essentially of(A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount,(B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m,(C) nonpolar liquid soluble ionic or zwitterionic compound, and(D) a quaternaryammonium hydroxide compound as defined, e.g., tetraethylammonium hydroxide, tetrabutylammonium hydroxide, etc., soluble in an amount of at least 0.5 part per million by weight in the nonpolar liquid.The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lyla M. El-Sayed, James R. Larson
  • Preparation of 4-pentenenitrile by isomerization
    Patent number: 4783546
    Abstract: Isomerization by contacting 3-pentenenitrile with a heterogeneous catalyst, preferably promoted with at least 1 group 8 noble metal, to form 4-pentenenitrile.
    Type: Grant
    Filed: June 2, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Patrick M. Burke, Norman Herron, Francis J. Waller
  • Vacuum pinning process
    Patent number: 4783304
    Abstract: A process improvement for preparing thermoplastic polymeric film, preferably of polyethylene terephthalate, by extruding a web in melt form onto a quench drum with a surface roughness of at least 3 microinches. In casting webs of less than about 5 mils in thickness the improvement involves drawing the melt to a melt drawdown ratio of less than about 25 and spacing the die lips from the quench roll at less than about 120 mils, preferably 20 to 80 mils. It is also preferred that the flow stability index be greater than 5.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David E. Heyer
  • Photographic masks for tonal correction
    Patent number: 4783385
    Abstract: Process for production of photographic masks for tonal correction by dry dot etching comprising exposing a mask film, e.g., positive film, behind a film combination of half-tone positives and negatives that contains at least one pair of a positive and a negative of the same color separation, said pair being separated from one another by a spacer film, e.g., transparent, matt film, etc. The half-tone values at the points to be corrected are in the range of 30-70%.
    Type: Grant
    Filed: March 31, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gerhard F. Duesdieker
  • Polyester fiberfill and process
    Patent number: 4783364
    Abstract: Polyester fiberfill having spiral-crimp, especially in the form of an omega (.OMEGA.), that is randomly-arranged and entangled in the form of fiberballs with a minimum of hairs extending from their surface, and having a refluffable characteristic similar to that of down on account of the low cohesion between the balls. A process for making such fiberballs by repeatedly air-tumbling small tufts of such fiberfill against the wall of a vessel.
    Type: Grant
    Filed: October 21, 1986
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Marcus Ilan
  • Process for preparing composite membranes
    Patent number: 4783346
    Abstract: A multistage process for preparing interfacially polymerized polyamide reverse osmosis membranes on a microporous support is disclosed. The process involves applying a solution containing from 1 to 10 wt % of an aromatic diamine having 1 or 2 aromatic rings and 2 to 3 amino groups in a first solvent to the microporous substrate. Then a solution of an aromatic or cyclophatic acyl chloride having 1 or 2 rings and 2.2 to 4 acyl chloride groups in a solvent immiscible with the first solvent is applied to the microporous substrate. Then a solution of different acyl chlorides is applied to the substrate. The acyl chlorides in this second solution can have 2 to 4 acyl chloride groups attached to an aliphatic group of 6 to 12 carbon atoms or an aromatic or cycloaliphatic group having 1 or 2 rings and containing 8 to 14 carbon atoms. Also suitable for the second treatment are bis chloroformates.
    Type: Grant
    Filed: December 10, 1987
    Date of Patent: November 8, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Sherman A. Sundet
  • Switch actuating assembly
    Patent number: 4782201
    Abstract: A switch actuation assembly is provided with a support means for supporting the switch in a fixed position relative to orientations of a moveable member. A motion response element is operably connected to the moveable member for being moved in one of two directions in response to movement of the moveable member toward one of the orientations and for being moved in the other of the two directions in response to the movement of the moveable member toward the other of the two orientations. An actuating member is provided for engaging the switch to actuate the switch from a first position to a second position. The actuating member is in frictional contact with the motion response element whereby the actuating member is moved by the response element until any force of resistance to the movement of the actuating member exceeds the static friction force.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: November 1, 1988
    Assignee: J. I. Case Company
    Inventors: Lorne R. Pollard, Ronald Stowell, William Flood, Eugen J. Bexten, J. Richard Harwood
  • Circular knit with warp knit structure and method of making same
    Patent number: 4781039
    Abstract: A knitted covering for a core, e.g. of hose or electrical cable or the like, is constituted as a circular warp knit in which each of a single system of warp yarns jumps over at least one and less than all of the wales of the system in passing from course to course. A method of making the knitted core covering is also described.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: November 1, 1988
    Assignee: Institute Po Obleklo I Tekstil
    Inventors: Bojidar P. Ribarev, Savko T. Petrov, Veselin G. Mintchev, Kiril L. Kirilov, Yordanka P. Ribareva, Boryana B. Ribareva, Hristo D. Popov
  • Optical fiber material having optical fiber tightly held by wrapping material
    Patent number: 4781430
    Abstract: An optical fiber material comprising at least one optical fiber and a wrapping material wrapping at least a part of the peripheral surface of the optical fiber in the axial direction of the optical fiber, wherein in its section taken at right angles to the axis of the optical fiber, the wrapping material holds the optical fiber tightly at its inside surfaces which face the optical fiber in the meridian direction of the optical fiber, or hold it tightly in at least three sites of its inner circumferential surface facing the optical fiber.The present invention provide also processes and devices for preparation thereof.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Toshiyasu Tanaka
  • 4,7-dioxatricyclo(3.2.1.0.sup.3,6)octane ether
    Patent number: 4782169
    Abstract: Compounds of the Formula I, II, III, VI and VII ##STR1## wherein the symbols have defined meanings are herbicides, plant growth regulators or intermediates thereof.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Samuel B. Soloway, Pierre Vogel, Claude H. Aubin Le Drian, James E. Powell
  • Ester interchange polyester preparation with alkali metal fluoride catalyst
    Patent number: 4782131
    Abstract: Polyester formation is catalyzed by an alkali metal fluoride other than lithium fluoride.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Wilfred Sweeny
  • Thermoplastic compositions of crystalline polyolefin, and ethylene/alkyl acrylate copolymer elastomer
    Patent number: 4782110
    Abstract: A melt processible multi-phase thermoplastic composition comprising a blend of:(A) 15-75 parts by weight of a crystalline polyolefin resin comprising polymerized monomer units of ethylene or propylene or mixtures thereof forming the continuous phase of the composition, and(B) 25-80 parts by weight of a crosslinked elastomer of an ethylene/alkyl acrylate copolymer consisting essentially of units derived from ethylene, an alkyl ester of acrylic acid wherein the alkyl group contains 1-6 carbon atoms and a monoalkyl ester of 1,4-butenedioic acid wherein the alkyl group contains 1-6 carbon atoms forming the discontinuous phase of the composition.
    Type: Grant
    Filed: November 7, 1985
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James R. Wolfe, Jr.
  • Process for preparing butyrolactones and butanediols
    Patent number: 4782167
    Abstract: A process is disclosed for preparing butyrolactones, butanediols, and mixtures thereof comprising hydrogenating a hydrogenatable precursor in the presence of an aqueous reaction medium and a catalyst comprising palladium or combinations thereof with rhenium and at least one support selected from the oxides of titanium, zirconium, and hafnium.
    Type: Grant
    Filed: January 23, 1987
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Velliyur N. M. Rao
  • Titanium dioxide pigment coated with boria-modified silica
    Patent number: 4781761
    Abstract: Pigments are disclosed which consist essentially of rutile TiO.sub.2 particles bearing coatings comprising SiO.sub.2 and B.sub.2 O.sub.3.
    Type: Grant
    Filed: April 30, 1986
    Date of Patent: November 1, 1988
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Howard W. Jacobson
  • Battery enclosure system for tractors
    Patent number: 4779692
    Abstract: An improved tractor battery enclosure of the type having a service opening, including walls forming an enclosure, a suspended battery-support floor approximating the size of a battery base and movable between a battery use position and an at least partially offset position, and a door along the lead edge of the floor movable between a closed position and an open position coplanar with the floor, such that a battery may readily be moved with the floor and then along the floor to a full service position in which it is at least partially supported by the door.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: October 25, 1988
    Assignee: J. I. Case Company
    Inventors: Jon R. Hagarty, Alfred J. Joscher