Patents Assigned to I. du Pont de Nemours and Company
  • Thermoplastic blow moldable polybutylene terephthalate compositions
    Patent number: 5128404
    Abstract: Semi-crystalline blow moldable polyester compositions formed by melt blending a mixture consisting essentially of a poly(butylene terephthalate, an ethylene copolymer containing epoxide groups, and an ionomer obtained by neutralizing with Na.sup.+ or K.sup.+.
    Type: Grant
    Filed: June 18, 1990
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: King L. Howe
  • Lidding for containers
    Patent number: 5126176
    Abstract: Lidding of a sealant layer adhered to a substrate is provided wherein the sealant layer is a blend of ethylene/unsaturated ester copolymer with ethylene/unsaturated acid/unsaturated ester terpolymer, and wherein the sealant layer provides a peel strength of 500 to 2200 g/cm.sup.2 to a wide variety of container materials, with the peel strength being substantially insensitive to operating variations in seal temperature, and the sealant layer has a higher cohesive strength than the peel strength of its seal to the container material.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Karen U. Blaskovitz, Stephen R. Tanny
  • Nylon compositions for blowmolding
    Patent number: 5126407
    Abstract: It has now been found that a unique combination of additives makes semi-crystalline polyamides readily processible by extrusion blowmolding to make hollow, stiff parts of various shapes. The compositions consist essentially of a semicrystalline polyamide, a selected ionomeric toughening agent, and an anhydride-rich ethylene copolymer.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Pallatheri M. Subramanian
  • Fluorescent paper strength enhancing resin
    Patent number: 5125929
    Abstract: A fluorescent resin suitable for use as a paper strength enhancing additive having the formula: ##STR1## where each R is independently selected from the class consisting of methyl and hydrogen, X is a halogen selected from the group consisting of Cl, Br and I, and n is the integer 8 or a larger integer.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ronald L. Amey
  • Process for detecting polymorphisms on the basis of nucleotide differences
    Patent number: 5126239
    Abstract: A process is provided for detecting polymorphisms on the basis of nucleotide differences in random segments of the nucleic acid by performing a primer extension reaction on the nucleic acids and comparing the extension reaction products. The random nucleic acid segment can be amplified by first dissociating the extension product from the template and contacting the dissociated extension product with a primer under conditions such that an amplification extension product is synthesized using the dissociated extension product as a template. Differences in the extension product are useful as markers in constructing genetic maps and as markers to distinguish or identify individuals.
    Type: Grant
    Filed: March 14, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Kenneth J. Livak, Jan A. Rafalski, Scott V. Tingey, John G. Williams
  • Process for preparing methyl- and ethyl-substituted primary anilines
    Patent number: 5126484
    Abstract: A process is disclosed for the preparation of methyl- and ethyl-substituted anilines by contacting anilines of specified formula at about 250.degree.-525.degree. C. and about 10 kPa-10 MPa of pressure in the of presence of a nonbasic metal oxide catalyst which when it is a zeolite has pore dimensions of at least about 0.52 nm and has cages with dimensions greater than about 0.75 nm.
    Type: Grant
    Filed: October 1, 1985
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank J. Weigert
  • Herbicidal oxabicycloalkane ethers
    Patent number: 5125954
    Abstract: The present invention relates to novel bicyclo ether derivatives, to compositions containing them, and to their method of use especially to control the growth of undesired vegetation in rice.
    Type: Grant
    Filed: November 2, 1990
    Date of Patent: June 30, 1992
    Assignee: E.I. Du Pont de Nemours and Company
    Inventors: James E. Powell, Richard B. Phillips
  • Microporous discs of elastic segmented polyurethane
    Patent number: 5126181
    Abstract: Solutions of segmented polyurethanes are coagulated to form flat circular microporous structures having a substantially continuous pore-free surface and a substantially open pore surface.
    Type: Grant
    Filed: September 23, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Garret D. Figuly, Linda H. Smith
  • Method and apparatus for scoring and breaking an optical fiber
    Patent number: 5125549
    Abstract: The present invention relates to a method and apparatus for scoring and breaking an optical fiber and, specifically, for scoring and breaking an optical fiber near a ferrule forming an end face substantially normal to the longitudinal axis of the optical fiber.
    Type: Grant
    Filed: January 25, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Loyd T. Blackman, Aldert S. Root, III, Thomas W. Whitehead
  • Blends and structures based on ethylene vinyl alcohol copolymer and selected amorphous polyamides
    Patent number: 5126402
    Abstract: A blend of 5 to 95 percent of an ethylene vinyl alcohol copolymer and 95 to 5 percent of an amorphous polyamide having fewer than about 0.100 equivalents of carboxyl end groups per kilogram of polyamide exhibits improved oxidative and thermal stability. The blend is useful for preparing films and multiple layered structures including thermoformed structures and oriented shrink films.
    Type: Grant
    Filed: July 12, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard T. Chou
  • Bi.sub.2 Sr.sub.3-x Y.sub.x Cu.sub.2 O.sub.8+y superconducting metal oxide compositions
    Patent number: 5126316
    Abstract: Compositions having the nominal formula Bi.sub.2 Sr.sub.3-x Y.sub.x Cu.sub.2 O.sub.8+y wherein x is from about 0.05 to about 0.45 and y is from about 0 to about 1 are superconducting.
    Type: Grant
    Filed: August 24, 1988
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Arthur W. Sleight, Munirpallam A. Subramanian
  • Method for capturing and displaying a latent radiographic image
    Patent number: 5127038
    Abstract: A method for capturing and displaying radiographic images. More particularly, the present invention uses a unique microcapacitor matrix structure to hold varying electrical charges representing a latent radiographic image which are subsequently rendered visible through toning.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Lothar S. Jeromin, Denny L. Y. Lee
  • Laser assisted fiber growth
    Patent number: 5126200
    Abstract: Small diameter fibers formed from the use of laser energy and gaseous reactants and are disclosed. Also disclosed is an apparatus and method for the formation of continuous, substrate free, crystalline or amorphous fibers. Materials which can be formed into small diameter fibers include boron, silicon, germanium, zinc, tungsten, cadium, gallium, thenium, and compounds and mixtures thereof. The fibers have a diameter of about 10 micrometers to about 170 micrometers. The apparatus for producing the fibers includes a laser, a reaction chamber, and gas supply means. The laser beam has a focal point adjusted to coincide with the tip of the growing fiber, the focal point of the laser creating a region of elevated temperature at the fiber tip.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Paul C. Nordine
  • Process for the preparation of images on tonable, light-sensitive layers
    Patent number: 5126226
    Abstract: A process for preparing images on a tonable, light-sensitive layer in which a transfer layer containing a toner and a core/shell polymer as a binder is used. The core polymer has a glass transition temperature above 50.degree. C. and the shell polymer has a glass transition temperature below 40.degree. C. Such transfer layers are used in proofing processes for high quality printing.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Helmut H. Frohlich, Michael Fryd
  • High strength papers from floc and fibrids
    Patent number: 5126012
    Abstract: A high strength fibrid-floc sheet is made of a floc which can be carbon, aramid or glass. The fibrids are made from the following units: ##STR1## where n is 4 or 5; X is from 0.03 to 0.30 and Ar is a radical selected from 3,4'-oxydiphenylene, 4,4'-oxydiphenylene, 4,4'-sulfonyldiphenylene, 1,3-phenylene, 1-methyl-2,4-phenylene, and mixtures of such radicals with each other or mixtures of such radicals with up to 50 mol percent of 1,4-phenylene radicals based on the mixtures of radicals.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Gary L. Hendren, Hamid M. Ghorashi
  • Lighttight cassette
    Patent number: 5126774
    Abstract: A lighttight cassette has a housing including a wall surrounding the periphery of a roll of web material supported therein. The housing also includes two ends, connected through the wall of the housing, on which the roll is supported in a rotatable manner. The cassette has an externally operated brake device that applies an adjustable friction locking between an end surface of the roll and the adjacent end wall, thereby preventing unwanted unwinding of the film during transportation and storage.
    Type: Grant
    Filed: March 1, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: E. W. Erhard Loewe, Otfried Urban
  • Multi-stage process with adiabatic reactors for preparing alkyl glyoxylates
    Patent number: 5126478
    Abstract: The process in which alkyl glyoxylates are prepared by the catalytic oxidative dehydrogenation of the corresponding alkyl glycolates is improved by carrying out the process in at least two adiabatic reaction stages in series, in which no more than about 60 percent of the stoichiometric amount of oxygen is used in the first stage.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: George E. Heinsohn
  • Blends of ethylene vinyl alcohol copolymer and polyamides, and multilayer containers made therefrom
    Patent number: 5126401
    Abstract: A blenad consisting ethylene vinyl alcohol copolymer and a polyamide blend of an amorphous polyamide and a semicrystalline polyamide which is miscible with the amorphous polyamide but substantially immiscible with the vinyl alcohol copolymer exhibits good mechanical and barrier properties as well as good resistance to thermal degradation.
    Type: Grant
    Filed: July 19, 1990
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Richard T. Chou
  • Metal oxide-coated electrically conductive powders and compositions thereof
    Patent number: 5126915
    Abstract: Finely divided particles of electrically conductive metal having a coating thereon a refractory metal oxide which is insoluble in the electrically conductive metal and non-reducing in the present of the electrically conductive metal, (2) the coating being sufficiently thick that the Isoelectric Point of the coated conductive metal particles is at least 1 unit higher than the Isoelectric Point of particles of the refractory metal oxide, (2) the tap density of the coated metal particles is at least 90% as high as the tap density of the uncoated metal particles, and (3) the metal oxide coating constitutes at least 0.05% by weight of the coated particles.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: John G. Pepin, Howard W. Jacobson
  • Method for forming and consolidating a fiber reinforced resin structure
    Patent number: 5125993
    Abstract: Fiber reinforced resin composite structures are cured and fully consolidated while compensating for incomplete initial compaction of prepreg between cores, and the mandrel's thermal growth which spreads the cores apart by forming the structure around a metal alloy form fastened to a mandrel wherein the coefficient of thermal expansion of the metal alloy is greater than that of the mandrel.
    Type: Grant
    Filed: July 25, 1991
    Date of Patent: June 30, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Frank S. Principe