Patents Examined by Lorraine T. Kendell
  • Modified grooved polyester fibers and process for production thereof
    Patent number: 4954398
    Abstract: Disclosed is a novel polyester fiber, such as a poly(ethylene terephthalate) fiber, having at least one continuous groove wherein the surface of the groove is rougher than the surface outside the groove. Also disclosed is a drafting process involving surface hydrolysis for the preparation of such fibers. The fibers have improved cover, softness, and wetting characteristics.
    Type: Grant
    Filed: January 23, 1989
    Date of Patent: September 4, 1990
    Assignee: Eastman Kodak Company
    Inventors: Shriram Bagrodia, Bobby M. Phillips
  • Method of improving the flame retarding and fire blocking characteristics of a fiber tow or yarn
    Patent number: 4950540
    Abstract: Flame retarding and fire barrier structure comprising a blend of carbonaceous fibers and natural and/or synthetic fibers. The carbonaceous fibers have a nitrogen content of 5 to 35%, an LOI value of greater than 40 and are derived from stabilized acrylic fibers.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: August 21, 1990
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., R. Vernon Snelgrove, Frank W. Hale, David M. Hall
  • Radiation grafting of organopolysiloxanes
    Patent number: 4950546
    Abstract: This invention provides for the radiation grafting of certain organopolysiloxanes to polymeric supports. The organopolysiloxane material is partially crosslinked mixture which contains from about 10% to about 90% by weight of uncrosslinked organopolysiloxane oil and has a cone penetration of about 100 to about 350 (10.sup.-1 mm) and an ultimate elongation of at least about 100%. The organopolysiloxane fluid may be placed on the polymeric support and crosslinked to produce an organopolysiloxane material having the above properties and being bonded to the polymeric support. The organopolysiloxane material also can be crosslinked to the above properties by conventional means then placed in contact with the polymeric support and irradiated to crosslink the material to the polymeric support without substantially changing the properties of the organopolysiloxane material.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: August 21, 1990
    Assignee: Raychem Corporation
    Inventors: Robert S. Dubrow, Catherine A. Dittmer, William D. Uken
  • Flame retarding and fire blocking carbonaceous fiber structures and fabrics
    Patent number: 4950533
    Abstract: Flame retarding and fire barrier structure comprising a blend of carbonaceous fibers and natural and/or synthetic polymeric fibers. The carbonaceous fibers are present in the blend in an amount of from 7.5 to 92.5 percent and have a carbon content of greater than 65 percent and a LOI value of greater than 40. The structure also contains carbonaceous particles or platelets.
    Type: Grant
    Filed: July 21, 1989
    Date of Patent: August 21, 1990
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., R. Vernon Snelgrove, David M. Hall
  • Low temperature finish
    Patent number: 4946375
    Abstract: A polyamide yarn especially suitable as a tire yarn having 0.2-2.0 wt. % of a finish, said finish consisting essentially of 50-95 wt. % lubricants having a melting point not greater than about 12.degree. C., wherein at least 40 wt. % of the lubricants is pentaerythritol tetrapelargonate, 5-50 wt. % of the finish is sorbitan triester adduct with 10-30 moles ethylene oxide, 0-5 wt. % of the finish is antioxidant and 0-2 wt. % of finish is a polysiloxane.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: August 7, 1990
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Fleming H. Day
  • Polyether imide fibers
    Patent number: 4943481
    Abstract: Melt-spun polyether imide fibers are disclosed wherein the granules are brought to a moisture content of below 0.05%, the melt is extruded from nozzles at a temperature between 300.degree. and 440.degree. C., and the spun fibers are taken up at a speed of up to 2,500 m/min. Fibers produced in this fashion can be stretched up to 1:3 and spin-dyed.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: July 24, 1990
    Assignee: Akzo N.V.
    Inventors: Diederich Schilo, Willi Birkenfeld
  • Seat cushions
    Patent number: 4943478
    Abstract: A non-linear fire retarding and fire blocking covering for a foam seat cushion structure comprising an intimate blend of a binder and 25-75% by weight of fibers comprising heat set carbonaceous fibers having a LOI value greater than 40, said carbonaceous fibers being derived from heat treated stabilized polymeric fibers or pitch based fibers.
    Type: Grant
    Filed: June 14, 1988
    Date of Patent: July 24, 1990
    Assignee: The Dow Chemical Company
    Inventors: Francis P. McCullough, Jr., R. Vernon Snelgrove
  • Polyphenylene sulfone fibers and a method for production thereof
    Patent number: 4942091
    Abstract: Polyphenylene sulfone fibers mainly consisting of a structural unit represented by a general formula ##STR1## (x is 0 or 1 or 2) wherein x, the average value of x, is 1.0 to 2.0, and a method for production thereof. These fibers are prepared by modifying polyphenylene sulfide fibers, whose specific surface area and degree of orientation arr more than 0.4 m.sup.2 /g and more than 70%, respectively, to polyphenylene sulfone fibers represented by a main constituting unit ##STR2## with organic peroxides. These fibers have excellent heat and chemical resistance.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: July 17, 1990
    Assignee: Toray Industries, Inc.
    Inventors: Masao Umezawa, Toshio Tsubota, Shiro Imai
  • Rapidly shrinking fiber and water-absorbing shrinkable yarn and other materials comprising same
    Patent number: 4942089
    Abstract: Rapidly shrinking fibers hardly soluble in water and capable of shrinking in water at 20.degree. C. by not less than 30% in not longer than 10 seconds are obtained, for example, by spinning, drawing and heat-treating a carboxy-modified polyvinyl alcohol under specific conditions. Yarns made from a fiber of this kind in conjunction with a fiber slowing shrinking in water as well as nonwoven fabrics made by incorporating yarns containing said rapidly shrinking fibers in nonwoven fabric shrinkable upon absorption of water are suited as means of tightly fitting edge portions of disposable diapers to the thigh.
    Type: Grant
    Filed: December 14, 1988
    Date of Patent: July 17, 1990
    Assignee: Kuraray Company Limited
    Inventors: Tsuneo Genba, Junichi Yoshinaka, Shingo Nakanishi
  • Microporous composites and electrolytic applications thereof
    Patent number: 4939028
    Abstract: Microporous composites adopted for electrolytic applications, e.g., as cathodes in the electrolysis of sodium chloride, are comprised of a regular, homogeneous and consolidated microporous deposit of monodispersed carbon fibers on a perforated rigid support substrate therefor, said carbon fibers having a distribution by length such that the mean length of at least 80% of the individual fibers, plus or minus 20%, corresponds to the mean length of said fibers.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: July 3, 1990
    Assignee: Rhone-Poulenc Chimie de Base
    Inventors: Jean Bachot, Jean-Claude Kiefer
  • Covered lead wire for vehicles
    Patent number: 4937142
    Abstract: A covered lead wire for vehicles, comprising a cover comprising a composition containing;(A) 100 parts by weight of polyvinyl chloride resin;(B) 0.1 part to 10 parts by weight of polyorganosiloxane;(C) at least 30 parts by weight of a plasticizer; and(D) at least 1 part by weight of a stabilizer.The present covered lead wire can achieve good abrasion resistance and scrape resistance even with reduced thickness of the cover, and can meet the recent demands for the weight-saving and improvement of wiring workability.
    Type: Grant
    Filed: April 20, 1989
    Date of Patent: June 26, 1990
    Assignee: Shin Etsu Chemical Co., Ltd.
    Inventors: Yoshimi Ogushi, Osamu Matsumoto
  • Metal coated fibers containing a sol gel formed porous polysilicate, titania or alumina interlayer and composite material articles reinforced therewith
    Patent number: 4935296
    Abstract: A metal-coated substrate, e.g., of glass, ceramic, or a hydroxy-functionalized material, wherein the improvement comprises a polysilicate, titania, or alumina interlayer between the substrate and the metal coating. The interlayer may have a porous microstructure, e.g., a polysilicate interlayer with an average pore size on the order of 50-150 Angstroms.Such articles, e.g., in the form of metal-coated fibers, may suitably be employed as reinforcing media in material composites having utility in structural applications, such as EMI shielding elements.Also disclosed is a corresponding method for forming a metal coating on a substrate by the provision of an interlayer of the above type. The interlayer may suitably be formed by applying to the substrate a sol gel dispersion of the polysilicate, titania, or alumina material, followed by drying of the applied dispersion.
    Type: Grant
    Filed: October 31, 1988
    Date of Patent: June 19, 1990
    Assignee: Advanced Technology Materials, Inc.
    Inventor: Ward C. Stevens
  • Rubber-reinforcing fibrous materials
    Patent number: 4935297
    Abstract: Rubber-reinforcing fibrous materials are disclosed, which each comprise fibers and a coat formed on the fibers. The coat is formed by applying a rubbery adhesive composition on the fibers and then thermally treating the rubbery adhesive composition-applied fibers. The rubbery adhesive composition is mainly composed of rubber latex and mixed with a bismaleimide compound at a mixing ratio of 0.25 to 5 relative to 100 of the rubber latex in terms of weight.
    Type: Grant
    Filed: April 22, 1988
    Date of Patent: June 19, 1990
    Assignee: Bridgestone Corporation
    Inventor: Toshihiro Yotsumoto
  • Cables formed with interdispersed polymer insulation compositions and method of making
    Patent number: 4935262
    Abstract: A method of making a cable article which comprises a conductor that is at least partially insulated by a flexible composition, said method comprising forming a homogeneous, interdispersed polymer insulation composition by combining low density polyethylene polymer with a polychloroprene polymer and at least an amount of fibrous polytetrafluoroethylene that is effective to form an interdispersion of polymers and thereafter coating a conductor with said insulating composition.
    Type: Grant
    Filed: February 2, 1989
    Date of Patent: June 19, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: Edward V. Wilkus, Alexander F. Wu
  • Electrical conductor provided with a surrounding insulation
    Patent number: 4935302
    Abstract: An electrical conductor is provided with an electrical insulation (11) surrounding the conductor (10) and a surrounding protective layer (12) which protects the insulation against degradation caused by corona. The protective layer consists of an organic polymer containing at least 10 percent by volume of a powdered filler in the form of chromium oxide, iron oxide, or a mixture of chromium oxide and iron oxide. The filler preferably has an intrinsic resistivity of 10.sup.4 -10.sup.8 ohm m. The thickness of the protective layer is preferably smaller than the thickness of the underlying insulation (11) and its resistivity preferably exceeds 10.sup.10 ohm m. The conductor is used, among other things, in windings and coils for electrical machines.
    Type: Grant
    Filed: March 21, 1988
    Date of Patent: June 19, 1990
    Assignee: Asea Brown Boveri AB
    Inventors: Arne Hjortsberg, Goran Holmstrom, Lennart Johansson, Thommy Karlsson
  • Composite fibrous material
    Patent number: 4929503
    Abstract: A composite fibrous material which comprises 50 to 95% by weight of (A) polyethylene fibers having high tenacity and tensile modulus and 5 to 50% by weight of (B) all aromatic polyamide fibers and/or (C) all aromatic polyester fibers, which has improved creep resistance and low shrinkage.
    Type: Grant
    Filed: December 18, 1986
    Date of Patent: May 29, 1990
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Yoshikazu Shirasaki, Yoshio Tadokoro
  • Fibrillated fibers and articles made therefrom
    Patent number: 4929502
    Abstract: This invention relates to fibrillated fibers having particular physical characteristics, articles made therefrom as well as methods of producing the same. In particular the fibrillated fibers are defined by their Canadian Standard Freeness in combination with their Tensile Strength when formed into a sheet.
    Type: Grant
    Filed: October 14, 1986
    Date of Patent: May 29, 1990
    Assignee: American Cyanamid Company
    Inventor: Robert D. Giglia
  • Elastomeric polyether block amide nonwoven web
    Patent number: 4923742
    Abstract: An elastomeric nonwoven web is formed by meltblowing fibers composed of a polyether block amide copolymer.
    Type: Grant
    Filed: October 14, 1988
    Date of Patent: May 8, 1990
    Assignee: Kimberly-Clark Corporation
    Inventors: Thomas M. Killian, Tony J. Wisneski
  • Leather, in particular split leather provided with a dressing as a process and apparatus for producing dressed leather
    Patent number: 4923732
    Abstract: A dressed leather is provided at least on one side with depressions and have on this side absorbent protruding fibres. At this side the leather is bonded with a layer formed of an aqueous dispersion of synthetic plastics material, said layer fills the depressions and completely receives the protruding fibres and forms at least a part of the dressing, which dressing is provided with a structured surface at the side turned away from the leather.Preferably, the dressing consists of two layers, the inner layer, which is adjacent the leather and completely receives the protruding fibres, is formed of the aqueous dispersion of synthetic plastics material and the outer layer, which has the structured surface, consists of an aqueous dispersion of synthetic plastics material or of a liquid solution of synthetic plastics material.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: May 8, 1990
    Assignees: Philipp Schaefer, Microplastic Corp.
    Inventor: Philipp Schaefer
  • Melt-blown water-absorbing tissues and matts
    Patent number: 4919997
    Abstract: A melt-blown water-absorbing matt of fibers comprises a block copolyetheramide having polyether and polyamide segments. The matt structure provides excellent water absorbency and displays good resilience when exposed to humid conditions.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: April 24, 1990
    Assignee: Allied-Signal Inc.
    Inventors: Ian C. Twilley, Robert A. Lofquist