Patents Assigned to E
  • Electrical cable insulated with a tree-resistant ethylene polymer composition
    Patent number: 4456655
    Abstract: Propagation of electrical trees and water trees in electrical insulation made of ethylene homopolymers or copolymers with an unsaturated monomer is inhibited by the addition to the insulating composition of an organic carboxylic ester having at least one aromatic ring and at least three carboxylic ester groups, the ester being liquid at the operating temperature of the electrical equipment in which the insulation is used. The main utility of the inhibitors of this invention is in the primary insulation for power transmission cables, especially those used in high voltage applications.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: June 26, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John K. Beasley, Edward J. Urban
  • Can manufacture
    Patent number: 4455850
    Abstract: A can body is formed from a sheet of metal which has a matte coating composition applied to the portion of the sheet which will become the outside surface of a reentrant convex bottom of the can body.
    Type: Grant
    Filed: August 30, 1982
    Date of Patent: June 26, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jan M. B. Switten
  • Powdered wax, tablet coated therewith and method
    Patent number: 4456629
    Abstract: A novel powdered wax is provided which is especially adapted for use as a polishing agent for tablets and as a substrate for print carried by such tablets. A method for forming such powdered wax is also provided which includes the steps of milling pieces of wax with dry ice and then allowing the dry ice to evaporate while maintaining the milled wax at cool temperatures to prevent clumping.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: June 26, 1984
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Thomas G. Wood, Steven M. Oblack
  • Carboxy and substituted carboxy aroly peptides
    Patent number: 4456595
    Abstract: Peptides of the formula ##STR1## wherein X is various amino or imino acids or esters are useful as hypotensive agents.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: June 26, 1984
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Harold N. Weller, III, Eric M. Gordon
  • Coating composition containing a rheology control additive of silica and polyvinyl pyrrolidone
    Patent number: 4455331
    Abstract: A coating composition of a binder of film-forming constituents and nonaqueous liquid carrier, wherein the binder is a film-forming resin containing reactive carboxyl groups, hydroxyl groups, amide groups, glycidyl groups or a mixture of any of these groups and a crosslinking agent; and in addition the composition contains about 0.1-10% by weight, based on the weight of the binder, of a rheology control additive of(1) colloidal silica and(2) a polyvinyl pyrrolidone having a weight average molecular weight of about 3,000-500,000;The composition has excellent rheology control and can be used as exterior finishes on automobiles and trucks.
    Type: Grant
    Filed: September 22, 1983
    Date of Patent: June 19, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Robert J. Barsotti
  • Adjustable imbalance detector for a centrifuge
    Patent number: 4455461
    Abstract: An imbalance detector for a centrifuge includes a pendulum arm that is tuned to a critical frequency that lies within a predetermined range of the critical frequency of the rotor of the centrifuge. An imbalance force imposed by the rotor is transmitted to the detector and if the imbalance force exceeds a predetermined threshold the arm contacts an electrical contact to generate an appropriate electrical signal.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: June 19, 1984
    Assignee: E. I. DuPont de Nemours and Company
    Inventor: Stephen A. Maguire
  • Fluid friction heater
    Patent number: 4454861
    Abstract: A fluid friction heater is disclosed. The heater includes a housing having a cylindrical inner surface. At least nearly circumferential, closely spaced grooves are formed in the inner surface of the housing, the depth of the grooves being small relative to the diameter of the surface itself. A drum is mounted within the housing and has a cylindrical outer surface in close proximity to the inner surface of the housing. The outer surface of the drum has at least nearly circumferential, closely spaced grooves formed in it as well. The pitch of the grooves in the respective surfaces are different from one another. A liquid is injected into the space between the inner surface of the housing and the outer surface of the drum. The housing and the drum rotate relative to one another so that the liquid passing between their respective surfaces is sheared and agitated by the respective grooves in the surfaces.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: June 19, 1984
    Assignee: Raymond E. Shea
    Inventor: Wilfred J. Grenier
  • Preparation of pigmentary form of quinacridone pigments
    Patent number: 4455173
    Abstract: Pigmentary grade quinacridone pigments are prepared from crude quinacridone by conversion to aggregated low crystallinity quinacridones followed by milling the aggregated low crystallinity quinacridone in the presence of a liquid which wets the pigment and can improve the crystallinity of quinacridone at 10.degree. to 60.degree. C. Suitable quinacridones include ##STR1## and mixtures thereof with up to 15 wt. % of ##STR2## where R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 R.sup.6 are hydrogen, fluorine, chlorine, bromine, methyl or methoxy; R.sup.7, R.sup.9 and R.sup.10 are hydrogen or chlorine; and R.sup.8 is hydrogen, chlorine, bromine, nitro, alkyl groups of 1 to 5 carbon atoms, alkoxy groups of 1 or 2 carbon atoms or benzoylamino, and m is an integer of from 1 to 4.
    Type: Grant
    Filed: April 16, 1982
    Date of Patent: June 19, 1984
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Edward E. Jaffe
  • Transferring separated components in gel electrophoresis via nylon membrane
    Patent number: 4455370
    Abstract: Microporous nylon films used as transfer membranes for nucleic acids, proteins, bacteria and viruses.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: June 19, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Bart W. Bartelsman, Dennis L. Fost
  • Apparatus and method for filtration of a molten metal stream
    Patent number: 4455238
    Abstract: The present invention provides an apparatus and method for intersecting and filtering a molten metal stream. The apparatus includes a filtering vessel, which is fitted with a filter element. Means are provided for dampening the momentum of the molten metal stream so that the filter element is not damaged by impact with the molten metal stream. When not in use the filtering vessel can be placed within a molten metal bath for preheating. The present invention can be used to filter molten metal that is being intermittently transferred.
    Type: Grant
    Filed: April 14, 1982
    Date of Patent: June 19, 1984
    Assignee: Daniel E. Groteke
    Inventor: Daniel E. Groteke
  • Cartridge having a pyrotechnical actuation of a payload with a safety device
    Patent number: 4454816
    Abstract: This invention relates to the safety of ammunitions.The projectile of a cartridge has a base which houses a safety stop consisting of a transversely slidable valve. A device ensures that the valve cannot be released until the projectile has been subjected to a powerful acceleration. Another safety device very advantageously ensures that the pyrotechnical chain inserted in the base functions only when the pressure of the ejection charge has been able to release a sealing-block.In particular, the invention may be applied to infra red window releasing cartridges.
    Type: Grant
    Filed: September 8, 1981
    Date of Patent: June 19, 1984
    Assignee: Societe E. Lacroix-Tous Artifices
    Inventors: Alain A. A. Billard, Hubert C. G. Calmettes, Roland C. Encoyand
  • Disc stirrer
    Patent number: 4453867
    Abstract: A solid circular plate mounted above the existing stirrer in a melt grid spinning apparatus provides a positive hold-up time for melting flake descending from the melt grid to the melt pump beneath the grid.
    Type: Grant
    Filed: August 9, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David L. Sharps
  • Ion exchange membranes
    Patent number: 4454247
    Abstract: Vinyl ether monomers derived from diesters of the formula: ##STR1## wherein R is CH.sub.3 or C.sub.2 H.sub.5 and n is 0 to 10; copolymers of the vinyl ether monomers with one or more selected perfluorinated monoolefins; articles of manufacture made from the copolymers; process for making the diesters; process for using copolymer membranes in a chlor-alkali cell.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours & Company
    Inventor: Paul R. Resnick
  • Herbicidal triazinyl sulfonamides
    Patent number: 4453970
    Abstract: N-[Heterocyclicaminocarbonyl]-8-quinolinesulfonamides such as N-[(4,6-dimethoxy-1,3,5-triazin-2-yl)aminocarbonyl]-8-quinolinesulfonamide or N-[(4,6-dimethoxypyrimidin-2-yl)aminocarbonyl]-8-quinolinesulfonamide are useful for plant growth retardation, brush control and weed control in crops.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: George Levitt, Chin-Lung Yeh, John C. Budzinski
  • Supported reverse osmosis membranes
    Patent number: 4454176
    Abstract: Preparation of supported reverse osmosis membranes on a woven, unsized, porous support using dimethylacetamide solvent and a lithium nitrate or chloride or magnesium chloride salt.
    Type: Grant
    Filed: October 14, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John J. Buckfelder, Henry M. Schleinitz
  • Electrical device containing a radiation-sensitive polyimide precursor composition derived from a diaryl fluoro compound
    Patent number: 4454220
    Abstract: An electrical device coated with a polymerized polyimide structure resulting from a radiation-sensitive polyimide precursor composition which comprises a polymer of the formula ##STR1## wherein n is a positive integer corresponding to the number of units in the polymer and is sufficiently large to provide the polymer with a number average molecular weight of about 1500-15,000 as determined by vapor pressure osmometry, and wherein for any particular unit in the polymer:.fwdarw.denotes isomerism; R.sup.1 is a divalent aromatic, aliphatic or cycloaliphatic radical containing at least 2 carbon atoms; R.sup.2 and R.sup.3 are selected from the group consisting of a hydrogen radical and any organic radical containing a photopolymerizable olefinic double bond; and R.sup.4 and R.sup.5 are selected from the group consisting of perfluoro and perhalofluoro aliphatic hydrocarbons having 1 to 8 carbons.
    Type: Grant
    Filed: September 29, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: David L. Goff
  • Accumulator conveyor
    Patent number: 4453627
    Abstract: A live roller accumulator conveyor has a plurality of zones between its inlet and discharge ends which are arranged in groups. Each zone has a sensor which reacts to the presence of an article therein by deactuating the drive for the adjacent upstream zone in order to provide for accumulation of multiple articles on the conveyor. When the accumulated articles are to be discharged, however, these controls are overriden so that when the zone immediately downstream from a group of zones is cleared, the drives for all of the zones of the next upstream group are actuated simultaneously so that all of the group of articles accumulated therein advance in unison.
    Type: Grant
    Filed: July 20, 1981
    Date of Patent: June 12, 1984
    Assignee: The E. W. Buschman Co.
    Inventor: John J. Wilkins
  • Ion-selective layered sensor and methods of making and using the same
    Patent number: 4454007
    Abstract: A layered half cell comprising (a) an inert insulating substrate having coated thereon (b) a layer of conductive material having coated thereon (c) a layer of carbon dispersed in a dielectric polymer, the layer being coated with (d) an ion-selective membrane layer, the interface between layers (c) and (d) being partially interdiffused.
    Type: Grant
    Filed: January 27, 1983
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Salvatore J. Pace
  • Substituted benzene sulfonyl isocyanates as intermediates to herbicidal sulfonamides
    Patent number: 4454335
    Abstract: Novel o-aminosulfonylphenyl acetic acid derivatives are useful as plant growth regulants and herbicides.
    Type: Grant
    Filed: June 14, 1982
    Date of Patent: June 12, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George Levitt
  • Display box for a watch
    Patent number: D274408
    Type: Grant
    Filed: February 1, 1982
    Date of Patent: June 26, 1984
    Assignee: E. Gluck Corporation
    Inventor: Bernard Fernandez