Patents Assigned to E
  • Emulsion-containing explosive compositions
    Patent number: 4619721
    Abstract: In emulsion blend explosives, the replacement of coarse salt particles, e.g., prills, by fines, i.e., particles which pass a No. 50 U.S. sieve, increases the water resistance of the explosive without deleteriously affecting its shelf life provided that the explosive, prior to such replacement, is storage-stable as determined by the Salt Extraction and lead compression tests described herein. Products containing a combination of whole and crushed ammonium nitrate prills, and emulsions made with an anionic emulsifying agent such as a fatty acid salt, are preferred. Depending on the fines content and chemical composition, other properties such as sensitivity to initiation and detonation velocity also may be improved.
    Type: Grant
    Filed: October 15, 1985
    Date of Patent: October 28, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lawrence A. Cescon, Robert W. Trebilcock
  • Sterile, cold cut connection process, apparatus and system
    Patent number: 4619642
    Abstract: A process, apparatus and system for making a sterile connection between thermoplastic tubes. A section of each tube is flattened and a cutting means is urged through the flattened sections. The tubes are aligned with each other and then the cut tube ends are melted, sterilized, and urged together to form a joint between the tubes for each pair of tube ends to be connected. Each joint is cooled and then subjected to light stress to open the temporary seal in each tube, thereby providing fluid communication therethrough.
    Type: Grant
    Filed: March 12, 1985
    Date of Patent: October 28, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Dudley W. C. Spencer
  • Protective respirator hood with inner and outer bibs
    Patent number: 4619254
    Abstract: A head mounted, protective respirator hood is improved by the addition of an inner bib structure. Embodiments of the improved hood for use with half or full face respirator masks as well as for use as a supplied air respirator hood are disclosed. An elasticized opening through the inner bib adapting the improved hood structure for mounting to a variety of different face masks is described. The use of a rigid neck ring to attach the inner bib to the neck opening of a protective suit is disclosed.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: October 28, 1986
    Assignee: E. D. Bullard Company
    Inventors: Anthony L. Moretti, Anselmo P. Pellolio, Jr.
  • Preparation of methyl isocyanate in a quartz reactor
    Patent number: 4620030
    Abstract: The process in which methyl isocyanate is prepared by the oxidative dehydrogenation of monomethyl formamide is improved by performing the reaction in a quartz reactor.
    Type: Grant
    Filed: October 23, 1984
    Date of Patent: October 28, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: George E. Heinsohn, Velliyur N. M. Rao
  • Flow meter
    Patent number: 4619146
    Abstract: A flow meter includes a piston having magnetic properties. The piston is located in a cylinder having an outlet slot. Fluid flow into the cylinder and out through the slot determines the position of the piston. The piston is preferably of a magnetic material which interacts with a Hall effect type transducer to produce an output voltage related to the position of the piston and, therefore, to the flow.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: October 28, 1986
    Assignees: William Banko, Henry E. Allen, Morris H. Shamos
    Inventors: Tonel E. Teodorescu, William Banko
  • Perfluorocarbon polymer oxidation catalyst and preparation of carbonyl compound
    Patent number: 4618724
    Abstract: This invention deals with the use of a perfluorocarbon polymer oxidation catalyst consisting of a perfluorocarbon main chain and a side chain constructed from structural units of chromium (III) difluoromethylene sulfonate or cerium (IV) difluoromethylene sulfonate in a method of preparing a carbonyl compound through an oxidation of an alcohol.
    Type: Grant
    Filed: February 11, 1985
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Hitosi Nozaki, Koichiro Oshima
  • Process for purifying 2-perfluoroalkylethanols
    Patent number: 4618731
    Abstract: R.sub.f CH.sub.2 CH.sub.2 I and R.sub.f I present in sufficient quantities so as to cause discoloration of R.sub.f CH.sub.2 CH.sub.2 OH or products made from it are reacted with an excess of an aqueous alkali metal hydroxide and a C.sub.1 -C.sub.3 alcohol in a closed vessel at a temperature above 80.degree. C. until neither of said iodides can be detected in said final product. NaOH and isopropanol at 100.degree.-115.degree. C. are preferred.
    Type: Grant
    Filed: November 20, 1985
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Leonard H. Beck
  • Manufacture of butanedicarboxylic acid esters
    Patent number: 4618702
    Abstract: Increased catalyst concentration relative to butadiene in its carboalkoxylation permits operation at reduced pressure and simplifies process steps.
    Type: Grant
    Filed: January 24, 1985
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael B. D'Amore, Roger R. Ellefson
  • Connector with strain relief
    Patent number: 4618202
    Abstract: Connector intended for attachment to the end of a cable consisting of one or more insulated conductors enclosed by a jacket, said connector comprising two housing parts which in the assembled state together define a passage having a first section designed to take the jacketed end of the cable, and a second section situated further in to take the insulated conductors projecting from the jacket. Both housing parts being provided at the first section with strain relief elements acting on the cable jacket in the assembled state, and one of the housing parts is provided at the second section with a pierce contact for each conductor.
    Type: Grant
    Filed: September 20, 1985
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Hubertus B. Libregts, Cornelis G. J. van Nes
  • Method of preparing L-(+)-.beta.-hydroxyisobutyric acid by fermentation
    Patent number: 4618583
    Abstract: A method is provided for preparing L-(+)-.beta.-hydroxyisobutyric acid by fermentation employing microorganisms of the species Pseudomonas aeruginosa and of the genus Protaminobacter such as of the species Protaminobacter alboflavus, and isobutyric acid and/or methacrylic acid and/or derivatives thereof as the substrate.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: October 21, 1986
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Robert S. Robison, Michael G. Doremus
  • Polyester fiberfill and process
    Patent number: 4618531
    Abstract: Polyester fiberfill having spiral-crimp 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: May 15, 1985
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ilan Marcus
  • Method and apparatus for machining racks for steering gear
    Patent number: 4618297
    Abstract: A machine for cutting the teeth of a rack for a variable ratio rack and pinion steering gear employing a helical pinion having a plurality of identical teeth engaged with a rack having some tooth gaps of varying form and angular disposition to the rack axis, the machine having a spindle carrying a tool with a single cutting tooth having cutting edges which lie on the surface of a single tooth of the helical pinion; the spindle is arranged for helical reciprocation in a housing between two predetermined limits about a mid position in which the tool is directed normally to the plane of the teeth of the rack, a rack holding fixture, the fixture or the housing being moveable with a relative translatory curvilinear motion during the cutting of a gap of the rack, the motion for any one gap being a part of the locus of the helical pinion when slid without rotation in the same gap of the rack.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: October 21, 1986
    Assignee: Arthur E. Bishop
    Inventors: Arthur E. Bishop, Klaus J. Roeske
  • Connector for establishing electrical contact with a high count twisted pair cable
    Patent number: 4618201
    Abstract: A connector for establishing electrical contact with a high count twisted pair cable is formed of a wiring block which telescopes into a receptacle. The leading edge of the wiring block in conjunction with the scalloped trailing edge of the receptacle forms a shear for cutting the conductors assembled in the wiring block to length.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Peter K. Townsend
  • Organic titanium compositions for use in oil and gas wells
    Patent number: 4618435
    Abstract: A dry, solid mixture of(a) the reaction product of(R.sup.1 O).sub.4 Tiwith (i)H.sub.g N(R.sup.2 OH).sub.kat a titanate:amino alcohol mol ratio of about 1:1, or (ii)R.sup.3 [N(R.sup.4 OH).sub.m R.sub.n.sup.5 ].sub.2at a titanate:amino alcohol mol ratio in the range between about 1:1 and about 2:1, and(b) a monosaccharide, disaccharide, or polyhydric alcohol which can be obtained by reduction of a monosaccharide, in an amount sufficient to enhance the uniform crosslinking capacity of said reaction product,whereinR.sup.1 is C.sub.1-6 alkyl;each of R.sup.2, R.sup.3 and R.sup.4 is C.sub.1-6 alkylene;R.sup.5 is H or C.sub.1-6 alkyl;k is 1-3 and g plus k equals 3; andm is 1 or 2 and m plus n equals 2.Mixtures are useful in thixotropic cements and in fluid fracture formulations for oil wells.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Donald E. Putzig
  • Spot quantitation
    Patent number: 4618937
    Abstract: Describes a method and system for improving the ability to quantitate the amount of flux or material in localized collections of such flux or material typically called a "spot". Quantitation of spots using a software algorithm which utilizes models in two opposite senses for quantitating peaks in a spot image of an electrophoresis gel is disclosed. The operating system includes a laser gel scanner module, a computer module, system peripherals, and analysis software.
    Type: Grant
    Filed: January 27, 1984
    Date of Patent: October 21, 1986
    Assignee: E. I. Du Pont de Nemours and Co., Inc.
    Inventors: John G. Elias, Peter A. Jansson
  • Polyester polymers of 3-hydroxy-4'-(4-hydroxyphenyl)benzophenone or 3,4'-dihydroxybenzophenone and dicarboxylic acids
    Patent number: 4617369
    Abstract: Aromatic polyesters derived from at least 10% glycols of the structure ##STR1## are disclosed. The polyesters have an inherent viscosity of at least 0.5 as measured from a 0.5 g solution in 100 ml of an equal volume mixture of p-chlorophenol and1,2-dichloroethane, and a heat of fusion of less than 1.5 joule per gram.
    Type: Grant
    Filed: September 4, 1985
    Date of Patent: October 14, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Gia Huynh-Ba
  • Herbicidal sulfonamides
    Patent number: 4617388
    Abstract: Certain sulfonylurea compounds with oxysulfonyl-, thiosulfonyl- or aminosulfonyl-containing groups are useful as pre- and/or post-emergence herbicides.
    Type: Grant
    Filed: December 30, 1985
    Date of Patent: October 14, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: James J. Reap
  • Cleaning device for jet pipes in TiO.sub.2 reactor
    Patent number: 4616375
    Abstract: A device for cleaning pipes and the like which comprises a shaft positioned in the pipe, and on the shaft a number of diamond-shaped elements which scrape the inner surface of the pipe as the shaft moves within it.
    Type: Grant
    Filed: November 13, 1984
    Date of Patent: October 14, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank Green
  • Electrical connector apparatus, and methods and apparatus for assembling same
    Patent number: 4616415
    Abstract: A partially pre-assembled electrical connector has metal terminals partially inserted in a housing. The connectors are completed by at least partially withdrawing each terminal from the housing, placing the end of a wire in the exposed portion of the terminal, crimping the terminal on the wire, and then fully inserting the terminal in the housing.
    Type: Grant
    Filed: April 30, 1985
    Date of Patent: October 14, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Ray C. Doutrich, George T. DeShong
  • Lens for hazard warning lamp or similar article
    Patent number: D286446
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: October 28, 1986
    Assignee: R. E. Dietz
    Inventors: Italo Caroli, Alfred G. Tienken