Patents Examined by J. M. Gray
  • Patent number: 6596394
    Abstract: The disclosed coated optical fiber includes a core surrounded by a cladding. At least a segment of the fiber is coated with a photopolymerizable coating composition. The photopolymerizable coating composition is a mixture of at least about 60% of a first polyurethane acrylate coating having a Young's modulus of at least about 400 MPa and about 5-40% of a second polyurethane coating having a Young's modulus of no more than about 50 MPa. The invention further includes a method of making the coated optical fiber. The method includes the steps of blending the photopolymerizable coating composition as recited above and splicing an end section of a first optical fiber having a core and a cladding to an end section of a second optical fiber having a core and a cladding, thereby forming a resultant optical fiber.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: July 22, 2003
    Assignee: Corning Incorporated
    Inventors: James R Toler, Edward J Fewkes
  • Patent number: 6593255
    Abstract: A fabric comprising at least one fiber strand comprising a plurality of fibers and having a resin compatible coating composition on at least a surface of the at least one fiber strand, wherein the at least one fiber strand has an Air Jet Transport Drag Force value of greater than 100,000 gram force per gram mass of strand as determined by a needle air jet nozzle unit having an internal air jet chamber having a diameter of 2 millimeters and a nozzle exit tube having a length of 20 centimeters at a strand feed rate of 274 meters per minute and an air pressure of 310 kiloPascals.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: July 15, 2003
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Ernest L. Lawton, Vedagiri Velpari, William B. Rice, Walter J. Robertson, Bruce E. Novich, Xiang Wu, Kami Lammon-Hilinski
  • Patent number: 6592988
    Abstract: A water- and oil-repellent, antistatic composition comprises (a) at least one nonpolymeric ionic salt consisting of (i) at least one cation selected from the group consisting of monovalent metal cations, divalent metal cations, and organic onium cations, and (ii) at least one weakly coordinating anion, the conjugate acid of the anion having an acidity greater than or equal to that of a hydrocarbon sulfonic acid, and with the proviso that the anion is organic or fluoroorganic when the cation is a metal; (b) at least one fluorochemical repellency-imparting additive or repellent; and (c) at least one insulating material. The composition exhibits good antistatic and repellency characteristics.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: July 15, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Delton R. Thompson, Thomas P. Klun, William M. Lamanna
  • Patent number: 6586094
    Abstract: The present invention relates to a fiber coated with a water blocking material that includes an essentially water free dispersion comprising a superabsorbent polymer and a dispersing medium. The fibers made according to this invention may be used, for example, as fiber reinforcing material used in the manufacture of cables, and in particular in yarns for fiber optical cables that use optical light wave guides for optical communication transmissions.
    Type: Grant
    Filed: November 19, 1999
    Date of Patent: July 1, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Serge Rebouillat, Friedrich V. Pfister
  • Patent number: 6576591
    Abstract: A coding scheme to identify the connections an optical fiber is to form in an optical assembly is provided. The coding scheme consists of a series of colors, typically four, provided along the fiber length. The combination of colors identifies the connection the fiber is to form. Colors are transferred to the optical fiber by sublimation of the dye at a relatively low temperature. The sublimed dye then diffuses into the outer coating of the optical fiber.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: June 10, 2003
    Assignee: Nortel Networks Limited
    Inventors: Kenneth Snowdon, James D Watts, Christopher G Tanner, Andrew Waterhouse, Alan Fisher
  • Patent number: 6528163
    Abstract: The present invention provides lyocell fibers made from pulp, in particular a pulp having a high hemicellulose content of at least 5%, includes cellulose that has a low average degree of polymerization of from about 200 to about 1100, a kappa number of less than 2.0, and wherein greater than 4% of pulp fibers have a length-weighted fiber length of less than 2.0 mm.
    Type: Grant
    Filed: April 23, 2002
    Date of Patent: March 4, 2003
    Assignee: Weyerhaeuser Company
    Inventors: James E. Sealey, II, W. Harvey Persinger, Jr., Mengkui Luo, Brian Wester
  • Patent number: 6524702
    Abstract: The present invention relates to electrically conductive devices comprising at least one electrically conductive substrate surrounded by an interpolymer composition. The interpolymer composition comprises at least one substantially random interpolymer comprising: (i) polymer units derived from: (a) at least one vinyl or vinylidene aromatic monomer, or (b) at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer; or (c) a combination of at least on vinyl or vinylidene aromatic monomer and at least one hindered aliphatic or cycloaliphatic vinyl or vinylidene monomer; and (ii) polymer units derived from at least one aliphatic olefin monomer having from about 2 to about 20 carbon atoms. Such devices include, for example, wire and cable assemblies.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: February 25, 2003
    Assignee: Dow Global Technologies Inc.
    Inventors: Stephen R. Betso, Martin J. Guest, Richard M. Remenar, Arnold W. Field, Alan Friday, James Freestone, Ian Reynolds, Fiona E. Keen, Jerker B. I. Kjellqvist, Caecile F. Fassian, Mark R. Easter, Steven Betteridge, Jill M. Martin
  • Patent number: 6514612
    Abstract: The present invention relates to a sizing composition for a glass yarn, consisting of a solution whose solvent content is less than 5% by weight, this solution comprising at least 60% by weight of polymerizable components, at least 60% by weight of these polymerizable components being components with a molecular mass of less than 750 and these polymerizable components comprising at least one mixture capable of polymerizing: of component(s) containing at least one reactive acrylic function and/or at least one reactive methacrylic function, and of component(s) containing at least one reactive primary amine function and/or at least one reactive secondary amine function, at least 20% of the polymerizable components containing at least two reactive functions chosen from acrylic, methacrylic, primary amine and secondary amine functions.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: February 4, 2003
    Assignee: Vetrotex France
    Inventors: Patrick Moireau, Marc Roubin
  • Patent number: 6514608
    Abstract: A semiconductive jacket material for jacketing a cable comprising a minor phase material which is a semicrystalline polymer; a conductive filler material dispersed in the minor phase material in an amount sufficient to be equal to or greater than an amount required to generate a continuous conductive network in the minor phase material; and a major phase material which is a polymer which when mixed with the minor phase material will not engage in electrostatic interactions that promote miscibility. The major phase material has the minor phase material dispersed therein in an amount sufficient to be equal to or greater than an amount required to generate a continuous conductive network in the major phase material, forming a semiconductive jacket material of a ternary composite having distinct co-continuous phases.
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: February 4, 2003
    Assignee: Pirelli Cable Corporation
    Inventor: Stephen H. Foulger
  • Patent number: 6514613
    Abstract: The present invention provides molded bodies made from a treated kraft pulp, the pulp having a high hemicellulose content or at least 7% a low copper number of less than 2, and including cellulose that has a low average degree of polymerization (D.P.) that has a range of 200 to 1100.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: February 4, 2003
    Assignee: Weyerhaeuser Company
    Inventors: Mengkui Luo, Vincent A. Roscelli, Amar N. Neogi, James E. Sealey, II, Richard A. Jewell
  • Patent number: 6514370
    Abstract: An apparatus for producing a hybrid boron reinforced polymer matrix composite from precursor tape and a linear array of boron fibers. The boron fibers are applied onto the precursor tapes and the precursor tape processed within a processing component having an impregnation bar assembly. After passing through variable-dimension forming nip-rollers, the precursor tape with the boron fibers becomes a hybrid boron reinforced polymer matrix composite. A driving mechanism is used to pulled the precursor tape through the method and a take-up spool is used to collect the formed hybrid boron reinforced polymer matrix composite.
    Type: Grant
    Filed: June 8, 2000
    Date of Patent: February 4, 2003
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: Harry L Belvin, Roberto J. Cano
  • Patent number: 6506492
    Abstract: A conductive polymer composite material for semiconductive jackets for cables which has a significant reduction in conductive filler content while maintaining the required conductivity and mechanical properties specified by industry. Materials and processing approaches are selected to reduce the percolation threshold of the conductive filler in the composite, while balancing the material selection with the industry-required mechanical properties of the semiconductive jacket. The semiconductive jacket material comprises a minor phase material which is a semicrystalline polymer; a conductive filler material dispersed in the minor phase material in an amount sufficient to be equal to or greater than an amount required to generate a continuous conductive network in the minor phase material; and a major phase material which is a polymer which when mixed with the minor phase material will not engage in electrostatic interactions that promote miscibility.
    Type: Grant
    Filed: May 7, 1999
    Date of Patent: January 14, 2003
    Assignee: Pirelli Cables & Systems, LLC
    Inventor: Stephen H. Foulger
  • Patent number: 6506491
    Abstract: A staple yarn comprising a blend of 35 to 90 weight percent fluoropolymer fiber and 65 to 10 weight percent of one or more types of blend fiber.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Arthur Russell Nelson, Reginald Thomas Kruszewski
  • Patent number: 6500540
    Abstract: The present invention relates to elastic articles comprising a crosslinked or crosslinkable ethylene polymer and a method for making the same. In particular, the invention relates to a shaped article (e.g. film or fiber) characterized by improved elasticity at elevated temperatures and comprising a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene polymer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures such as, for example, personal hygiene items and disposable infection-control garments at body temperatures of about 100° F. (38° C.).
    Type: Grant
    Filed: May 18, 1999
    Date of Patent: December 31, 2002
    Assignee: The Dow Chemical Company
    Inventors: Michael F. Langohr, Selim Bensason, Rajen M. Patel, Jill M. Martin, Thoi H. Ho, Nancy J. Schrock
  • Patent number: 6500541
    Abstract: Synthetic polymeric filaments containing SAP particles adhered to the filament surfaces by an nylon binder which is soluble in alcohols (e.g., lower C1-C3 aliphatic alcohols). Such SAP-coated filaments may then be incorporated into telecommunications cables as a component part thereof to achieve enhanced water-blocking functions. In preferred embodiments, the SAP particles include homopolymers, copolymers, and/or mixtures of sodium and potassium polyacrylates, starch grafted sodium polyacrylates and partial sodium salts of polypropenoic acid which are bound to the yarn surfaces by the nylon binder. Most preferably, the coated multifilamentary yarns of the present invention are made by bringing an uncoated yarn into contact with a nonaqueous liquid coating material comprised of the nylon binder dissolved in an alcohol solvent containing a dispersion of the SAP particles for a time sufficient to coat the yarn with the liquid coating material.
    Type: Grant
    Filed: September 18, 2000
    Date of Patent: December 31, 2002
    Assignee: Fil-Tech, Inc.
    Inventors: Vincent E. Schoeck, Jr., Edwin E. Fuller, Andrew Dubnik
  • Patent number: 6497953
    Abstract: Methods of making polymeric fibers are provided and include spinning a solution containing at least one polymer, a modified pigment having attached at least one organic group, and a solvent. The polarity of the solvent and the polarity of the modified pigment are selected such that the polymer is soluble in the solution and the modified pigment is maintained dispersed throughout the solution. The polarity of the modified pigment may be substantially the same as the polarity of the solvent. Fibers of acrylic-containing polymers and other polymeric fibers are also provided. Articles and reinforcing material containing the various fiber(s) are also described.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: December 24, 2002
    Assignee: Cabot Corporation
    Inventors: Michael Yu, Eduardo Romero, Curtis E. Adams, Marinus A. Potter, James A. Belmont, Patrick Collins
  • Patent number: 6482511
    Abstract: A polymer monofilament, which includes up to five percent by weight of at least one radiation-sensitive, mark-forming additive, said weight percentage based on the total weight of the polymer and additive only, is marked with a laser. The laser-marked monofilament may be used as a bristle for a brush such as a toothbrush or a paint brush.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: November 19, 2002
    Assignee: E.I. du Pont de Nemours & Company
    Inventor: Maria Eugenia Martinez Antonio
  • Patent number: 6482344
    Abstract: A method for providing improved absorbency against pressure characteristics to non-surface crosslinked superabsorbent polymer fibers.
    Type: Grant
    Filed: August 23, 2000
    Date of Patent: November 19, 2002
    Assignee: Stockhausen GmbH & Co. KG
    Inventors: Bernfried A. Messner, Whei-Neen Hsu, Mark C. Joy
  • Patent number: 6475617
    Abstract: Crystalline olefin polymers in the form of granules or nonextruded particles having regular geometric form, containing one of more of the following stabilizers: a) from 0.01 to 0.5% by weight of one or more organic phosphites or phosphonites or mixtures thereof; or b) from 0.005 to 0.5% by weight of one or more HALS (Hindered Amine Light Stabilizer), or c) mixtures of (a) and (b), and optionally one or more phenolic antioxidants at a concentration not higher than 0.2% by weight. The fibers obtained from said polyolefins have high thermoweldability and good resistance to yellowing and aging.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: November 5, 2002
    Assignee: Montell North America Inc.
    Inventors: Millo Branchesi, Luciano Clementini, Leonardo Spagnoli
  • Patent number: 6475620
    Abstract: A method for the deposition of a coating layer on an optical fiber while it is being drawn. The coating layer is designed to reduce the permeability of the optical fiber to water vapor and therefore to increase its lifetime. The method is characterized in that it consists in carrying out a decomposition of a gas mixture of boron halogenide and hydrogen and/or boron halogenide and ammonia gas by a microwave plasma-assisted addition of energy and in that the operation is conducted in the presence of a carrier gas in order firstly to carry the gas mixture to a reaction medium and secondly to activate the plasma.
    Type: Grant
    Filed: February 4, 2000
    Date of Patent: November 5, 2002
    Assignee: France Telecom (SA)
    Inventors: Yves Ruello, Benoit Cadier