Patents Assigned to E
  • Spandex filaments containing certain metallic soaps
    Patent number: 4296174
    Abstract: Spandex filaments are provided with decreased tackiness by effective amounts of soap dispersed within the filaments. The soap is a metal salt of a fatty acid, the metal being calcium, lithium or magnesium and the fatty acid being a saturated or unsaturated fatty acid having 10 to 22 carbon atoms. Stearates are preferred.
    Type: Grant
    Filed: August 8, 1980
    Date of Patent: October 20, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Robert S. Hanzel, Paul J. Sauer
  • Antihypertensive I-substituted cyclic lactam-2-carboxylic acids
    Patent number: 4296110
    Abstract: 1-Substituted cyclic lactam-2-carboxylic acids and their derivatives are useful as antihypertensive agents.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: October 20, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Alexander L. Johnson
  • 4-Azido-1-mercaptoacyl proline
    Patent number: 4296033
    Abstract: 1-Mercaptoacyl proline having an azido group in the 4-position inhibits the conversion of angiotensin I to angiotensin II in mammals and is useful for the treatment of hypertension.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: October 20, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Edward W. Petrillo, Jr., Frank L. Weisenborn
  • Antibiotic kristenin
    Patent number: 4296101
    Abstract: A new antibiotic, designated kristenin, is produced by the microorganism Bacillus subtilis. The antibiotic possesses activity against gram positive bacteria.
    Type: Grant
    Filed: February 13, 1978
    Date of Patent: October 20, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventors: Frank L. Weisenborn, William E. Brown, Edward Meyers
  • Cobulked continuous filament heather yarn method and product
    Patent number: 4295329
    Abstract: An improved method for making a continuous filament heather dyeable yarn involves cobulking in a hot fluid jet process a first unbulked yarn with a second differentially dyeable previously bulked yarn. The method enhances differential dyeability in the product when both yarns have a common type of chemical dye site and the second yarn has a greater concentration of those dye sites than the first yarn.
    Type: Grant
    Filed: June 10, 1980
    Date of Patent: October 20, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William T. Windley
  • Friction type exercising device with improved friction setting indicator
    Patent number: 4294446
    Abstract: An exercise device which can be fixed to a support and through which a rope is pulled against the force of frictional engagement within the exercise device. The resistive force against the pull is determined by the number of turns of the rope about a center shaft in the exercise device. The force is indicated by an improved indicator which moves longitudinally in the device as the number of turns is changed and which can be viewed for determining the frictional force.
    Type: Grant
    Filed: July 23, 1979
    Date of Patent: October 13, 1981
    Assignee: Ronald E. Useldinger
    Inventor: Gerald L. Moore
  • Epoxy imide compositions
    Patent number: 4294877
    Abstract: A composition useful for making circuit boards which is the reaction product of(a) an epoxy resin or an epoxy novolac resin and optionally, a brominated epoxy resin and(b) a bismaleimide; wherein the product of (a) and (b) is subsequently reacted with a curing agent such as a diamine of the formula H.sub.2 N--R.sup.1 --NH.sub.2 where R.sup.1 is an aromatic, aliphatic or cycloaliphatic group;The composition is used to impregnate a fibrous substrate of fiberglass, high temperature polyamides or graphite fibers which is laminated to a copper sheet; the resulting laminate is used to form a circuit boards that have good electrical and physical properties.
    Type: Grant
    Filed: June 6, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William F. Graham
  • Apparatus for manufacturing flat plastic net
    Patent number: 4294646
    Abstract: The invention provides a process and apparatus for manufacturing flat plastic net. Tubular plastic net is made by extruding plastic material through coaxial circular counter-rotating die members to form a net structure having a plurality of crossing strands. The angular displacement of successive longitudinally-aligned junctions of the crossing strands is controlled, preferably by controlling the relative counter-rotation of the extrusion die members, and successive longitudinally aligned junctions are cut longitudinally within each junction. The tubular net so cut is opened out to form flat net.The flat net so produced, the edges of which are characterized by successive longitudinal edge junctions, in which each edge junction is cut longitudinally within the junction, is particularly useful for fencing material, for example.
    Type: Grant
    Filed: June 3, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Thomas Urquhart
  • Thermal stabilization of polyalkylene terephthalate resin compositions
    Patent number: 4294938
    Abstract: Polyalkylene terephthalate molding blends with ionic hydrocarbon polymers as toughening agents are protected against thermal degradation and discoloration by the presence of a selected silicone resin.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Charles E. Berr, Edward J. Deyrup
  • Preparation of high purity 1,4-butanediol
    Patent number: 4294998
    Abstract: A process for the purification of crude 1,4-butanediol by crystallizing said crude in a solution comprising tetrahydrofuran at a temperature of from 10.degree. to -10.degree. C. and a pressure of from 16-26 mm of mercury to form a slurry of crystallized 1,4-butanediol in a liquid, and then separating the crystallized 1,4-butanediol from the liquid.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Harry B. Copelin
  • Polymers from phenylterephthalic acid
    Patent number: 4294955
    Abstract: Melt-spinnable anisotropic-melt-forming aromatic polyesters are prepared from phenylterephthalic acid or mixtures thereof with one or more selected aromatic dicarboxylic acids and one or more selected aromatic diols. The tenacity of as-spun filaments from these polyesters can be increased by heat treatment.
    Type: Grant
    Filed: December 10, 1979
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: John F. Harris, Jr.
  • Accelerated process for making nonlinear polyesters
    Patent number: 4294736
    Abstract: The reaction rate of the process for making nonlinear polyesters, i.e., conventional alkyds, is accelerated by using relatively large proportions of solvent, e.g., 15-50% by weight of an aromatic or ketonic high boiler, and, optionally, an esterification catalyst, e.g., tin oxalate. The process results in alkyds having more evenly distributed molecular weights with significantly reduced reaction times and at lowered reaction temperatures with consequent energy savings.
    Type: Grant
    Filed: March 24, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William H. Burgess, III, Philip Heiberger
  • Upholstered furniture having improved flame resistance
    Patent number: 4294489
    Abstract: Flame resistance of upholstered furniture is significantly improved by interposing between the cover fabric and the padding or applying to the top side of the cover fabric a layer of neoprene foam capable of forming when exposed to a burning cigarette or under the conditions of a standard flame spread test, a thermally insulating char which does not smolder, and which maintains its structural integrity. The neoprene foam must be so formulated that it also is capable of evolving at combustion temperature sufficient amount of water to efficiently cool the affected area. Normally, the latex from which the foam is prepared is formulated with a char promoter and a hydrated inorganic compound. Upholstered furniture of this invention passes a burning cigarette test and performs extremely well in the flame spread test.
    Type: Grant
    Filed: March 13, 1978
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Colin Anolick, Vivian M. Robinson, Charles W. Stewart, Sr.
  • Line identifier for switchboards
    Patent number: 4295007
    Abstract: A line identifier at a telecommunication switchboard comprises a matrix of magnetic-induction elements serving as current sensors for detecting a request for establishing a connection between a selected incoming line and a selected outgoing line. The sensors are connected to a multiplexer for providing samples in a time-division mode to a logic circuit controlled by a pair of microprocessors and addressing a read/write memory for storing information on the states of the sensors. A microprocessor, upon receiving from a sensor an identification request for a selected outgoing line, such request implicitly coding a selected input line, activates a relay which closes a circuit enabling the energization of a sensor whose output signal to the logic network identifies the outgoing line selected via the switchboard for connection to the prior-identified incoming lines.
    Type: Grant
    Filed: February 11, 1980
    Date of Patent: October 13, 1981
    Assignee: CSELT-Centro Studi e Laboratori Telecomunicazioni S.p.A.
    Inventors: Luciano Astegiano, Wouter M. D. van Veen
  • Photosensitive negative-working toning process
    Patent number: 4294909
    Abstract: A photosensitive element which comprises a support bearing a layer of negative-working tonable photoimaging composition comprising at least one organic polymeric binder (a), a photosensitizer (b) which generates an acid upon absorption of actinic radiation, and at least one compound taken from the group of ##STR1## as defined, binder (a) being plasticized by the decomposition product of either compound (c) or (d) or the combination thereof. The photosensitive element is useful in making color proofs.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ross A. Lee
  • Ethylene polymers of high melt index
    Patent number: 4294794
    Abstract: An ethylene polymer having a density in the range of about 0.940-0.960, a melt index in the range 100-200 and a ratio of weight-average molecular weight to number-average molecular weight of less than 5 is disclosed. The polymer is a copolymer of ethylene and at least one .alpha.-olefin having 4-10 carbon atoms, e.g., butene-1, hexene-1 or octene-1. The preferred polymer is a copolymer of ethylene and butene-1. The polymers may be used in the injection moulding of thin-wall containers, e.g., containers having a wall thickness of less than 0.7 mm, especially a thickness of less than 0.5 mm and in particular a thickness of less than 0.4 mm.
    Type: Grant
    Filed: August 20, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Peter J. Lovell, Ian C. B. Saunders
  • Process for the control of pH in the ethynylation of formaldehyde
    Patent number: 4294997
    Abstract: In the ethynylation of formaldehyde in the presence of a copper acetylide catalyst to produce butynediol, pH is controlled by the incremental or continuous addition of an alkali metal hydroxide and an alkali metal carbonate at an equivalent ratio of hydroxide ion to carbonate ion of 1:1-4:1.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Albert M. Stock, James D. Verbsky
  • Transparent toothpaste having a medicinal action and process for its production
    Patent number: 4294894
    Abstract: A transparent medicated toothpaste is provided which contains amorphous silica gel in finely divided form as a polishing cleaning component combined with a saline electrolyte having a decongestive-antiedematous action. A process for preparing such toothpaste is also provided.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: October 13, 1981
    Assignee: E. R. Squibb & Sons, Inc.
    Inventor: Enzo Vellucci
  • Water-extendible oligomer solutions and coatings therefrom
    Patent number: 4294738
    Abstract: Oligomer solution, process of increasing the water-miscibility of the oligomer solution, one- and two-part coating solutions containing the oligomer solution, and substrates coated with the coating solution, said oligomer solution being miscible with at least 12 wt % of water, based on non-volatile ingredients, and consisting essentially of:(a) about 50 to about 94 wt % of an oligomer having a degree of polymerization (DP) of about 10 to about 50, for example, an oligomer of vinyl acetate, hydroxyethyl acrylate, and a C.sub.1-8 alkyl acrylate;(b) 0 to about 30 wt % of a polyalkylene ether glycol having a molecular weight of about 400 to about 1300; and(c) 0 to about 20 wt % of a water-miscible solvent,with the sum of the weight percentages being 100%.
    Type: Grant
    Filed: October 28, 1980
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Aleksander Beresniewicz
  • Apparatus for pre-conditioning film
    Patent number: 4294533
    Abstract: An apparatus for removing dirt from an exposed film as it is advanced to an image developing unit includes a scrub roll with a spongy surface and a second roll in engagement therewith for transporting the film. A conduit with perforations directed at the scrub roll is positioned thereabove and is connected to a source of flushing liquid. The transport and scrub rolls are driven co-currently at different surface speeds to generate a scrubbing, shearing action along with simultaneous wetting of the film surface to remove most of any dust or dirt previously carried by or embedded in the surface of the film.
    Type: Grant
    Filed: August 3, 1979
    Date of Patent: October 13, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Martin D. Bratt, John F. Oakley