Patents Assigned to E
  • Silica microspheres, method of improving attrition resistance
    Patent number: 5128114
    Abstract: High-strength, non-agglomerated uniform porous microspheres of silica produced by spray drying a mixture comprising a colloidal silica sol and an additive selected from ammonium citrate or urea; an attrition resistant catalytic composite consisting essentially of metal crystallites such as palladium, platinum-palladium on said silica microsphere and method for preparing the same; and an improved process for making hydrogen peroxide from the direct combination of hydrogen and oxygen in the presence of said attrition resistant catalytic composite.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jo-Ann T. Schwartz
  • Irradiation of cation exchange membranes
    Patent number: 5128014
    Abstract: The present invention is a process for modifying a fluorinated cation exchange membrane by irradiation of the membrane with a sufficient dose of non-spark-producing radiation to decrease the voltage in the use of the membrane for electrolyzing brine.
    Type: Grant
    Filed: March 26, 1991
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Shoibal Banerjee
  • Drying with improved physical performance of photographic films
    Patent number: 5128236
    Abstract: A photographic, silver halide element that can be dried under rapid conditions during coating without deleterious effects on fog, kinks and other surface conditions, is described. This process can function with the addition of a small amount of a high boiling, aromatic alcohol to the emulsion prior to coating. Further improvements are noted with the addition of small amounts of a humectant and a plasticizer. The films resulting from this novel process can be handled without problems in the modern, automatic changing devices, for example.
    Type: Grant
    Filed: June 27, 1990
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Patricia J. Beighle, Carl P. Beitelshees, Daniel E. Jacober, Herbert W. Lim
  • Process for the preparation of 2-deoxy sugars
    Patent number: 5128463
    Abstract: A one-step reaction process is provided for the preparation of 2-deoxy-hexopyranoses and 2-deoxy-hexopyranosides. Also provided is a process for specially activating sulfonic acid resin for catalysis of the above one-step preparation of 2-deoxy sugars.
    Type: Grant
    Filed: January 24, 1991
    Date of Patent: July 7, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Subramaniam Sabesan
  • 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
  • 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
  • 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
  • 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
  • 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
  • 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
  • Mold for producing thermoplastic pieces by blow process, which pieces are used for storing liquid and solid materials
    Patent number: 5125826
    Abstract: A mold for producing thermoplastic pieces by blow process, which pieces are used for storing liquid and solid materials, having two equal symmetrical parts (1) and (1'), each of which is formed by a vertical plate (2) and provided with extensions (3), adjacent the upper and lower edges of the plate (2). Screws (4) which are screwed into holes (5), provided in one lateral edge of another plate (6), and is allowed to slide along channels (7); the plate (2) is provided with a slit (8) through which the screw (9) passes over plate (6) and is screwed into the hole (10) provided on another plate (11) which is orthogonal to plates (2) and (6).
    Type: Grant
    Filed: March 12, 1991
    Date of Patent: June 30, 1992
    Assignee: Industria E Comercio de Acumuladores Fulguris Ltda.
    Inventor: Marco A. Vac
  • 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
  • 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
  • AB-021 antibiotics and process for producing them
    Patent number: 5126265
    Abstract: The AB-021 Antibiotics and the main components thereof: AB-021a Antibiotic and AB-021b Antibiotic, obtained by means of the controlled aerobial cultivation of Streptomyces sp. NCIB 40068 in an aqueous nutrient cultivation medium, are disclosed.The AB-021 Antibiotics show a biological activity against pathogenous fungi of agrarian cultivations, of human pathogenous fungi and of bacteria.
    Type: Grant
    Filed: November 27, 1989
    Date of Patent: June 30, 1992
    Assignee: Presidenza del Consiglio dei Ministri-Ufficio del Ministro per il coordinamento delle Iniziative per la Ricerca Scientifica e Tecnologica
    Inventors: Dante Cidaria, Nunzio Andriollo, Giorgio Cassani, Enrico Crestani, Silvia Spera, Carlo Garavaglia, Giorgio Pirali, Giovanni Confalonieri
  • Coherent optical-fiber communication system using polarization diversity transmission
    Patent number: 5127066
    Abstract: A coherent optical-fiber transmission system is rendered insensitive to fluctuations of the state of polarization of the electromagnetic field due to propagation along the fiber by varying at the transmitting side the state of polarization of the optical carrier modulated by the information signal to be transmitted. The variation is such that spectral broadening of the intermediate frequency signal at the receiver is kept limited, while reception of half the power outgoing from the fiber is ensured.
    Type: Grant
    Filed: November 2, 1990
    Date of Patent: June 30, 1992
    Assignee: CSELT - Centro Studi e Laboratori Telecommunicazioni S.p.A.
    Inventor: Pierluigi Poggiolini
  • 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
  • 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
  • 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
  • Method for the formulation and preparation of heterochromatic paints and related products
    Patent number: 5125972
    Abstract: A method for the formulation and preparation of a heterochromatic paint comprises reacting one or more base mediums containing an anionic cellulose thickener in emulsion with an inorganic salt of a heavy or trivalent metal contained in a reactive medium emulsion. The heterochromatic paint comprises an emulsion containing non-soluble precipitated color particles, and each of the base mediums are of a different color. The inorganic salt is used in an amount sufficient to form dispersed phase reaction products contained in a dispersing phase emulsion and consisting essentially of a non-soluble precipitated color particles. The weight ratio of the dispersed phase to the dispersing phase in the heterochromatic paint is not greater than 0.4:1.
    Type: Grant
    Filed: November 10, 1988
    Date of Patent: June 30, 1992
    Assignee: Rosetti S.p.A. Vernici E Idee
    Inventor: Edoardo Rossetti
  • 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