Patents Examined by P. Ives
  • Patent number: 4504532
    Abstract: Phenolic insulators for blast tubes of rocket motors are disclosed. The insulators are rigid, low density bodies comprising 100 parts by weight crosslinked phenolic resin in which are dispersed finely divided inorganic particulate and fibrous reinforcement selected from carbon fiber, polyaramide pulp and combinations thereof. Compounding these rigid bodies is also disclosed, the compounding including forming a molding crumb containing the aforesaid ingredients.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: March 12, 1985
    Assignee: Hercules Incorporated
    Inventor: Liles G. Herring
  • Patent number: 4501841
    Abstract: Non-asbestos elastomeric insulating materials for rocket motors are disclosed. The insulating materials are low in density (between about 0.035 and 0.050 lb./cubic inch) and comprise 100 parts by weight of a crosslinked elastomer polymer in which are dispersed between about 10 and 100 (preferably 15-75) parts by weight of a char forming organic fiber selected from polyaramide pulps and between about 5 and 75 parts by weight inorganic particulate. The insulating materials issue little smoke, have notable erosion resistance and can be tailored to have thermal, mechanical and other properties of desired character. Ingredients such as phenolics, flame retardants, and liquid polybutadiene can enhance the utility of the insulating materials in certain embodiments.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: February 26, 1985
    Assignee: Hercules Incorporated
    Inventor: Liles G. Herring
  • Patent number: 4473612
    Abstract: A phototropic multilayered glass sheet incorporating at least two interfacially laminated layers, one layer consisting of a nonphototropic carrier glass, and at least one other layer consisting of a phototropic glass. In manufacture, at least one of the glass streams is characterized by having a viscosity of less than 10.sup.7.6 d PAS at the location where the streams are brought together.
    Type: Grant
    Filed: August 28, 1981
    Date of Patent: September 25, 1984
    Assignee: Deutsche Spezialglas AG
    Inventors: Werner Behr, Georg Gliemeroth, Klaus-Peter Hanke
  • Patent number: 4464432
    Abstract: A process for manufacturing porous textile substrates impregnated with thermoplastic polymeric pastes, especially fleeces or mats, with subsequent gelling out of polymeric paste, which comprises penetrating impregnating one side of a textile substrate with an evacuated paste comprised of a vinyl polymer and/or copolymers of vinyl chloride, while effecting complete displacement of air through the paste and compactly impregnating said substrate.
    Type: Grant
    Filed: August 31, 1981
    Date of Patent: August 7, 1984
    Assignee: Dynamit Nobel Aktiengesellschaft
    Inventors: Gerhard Dost, Walter Gerber, Eberhard Jaeger, Erwin Moschter, Richard Weiss
  • Patent number: 4461809
    Abstract: A surface treating agent for a shaped article of a polyolefin is provided which is composed of a solution in an organic solvent of a propylene-ethylene copolymer having a monoalkyl ester of a monolefinic dicarboxylic acid, such as monomethyl maleate, grafted thereto. The propylene-ethylene copolymer has a propylene content of 50 to 75 mole %, and a crystallinity, determined by an X-ray diffraction method, of 2 to 20%. The esterification degree of the alkyl ester of the monolefinic dicarboxylic acid is 45 to 100% if the esterification degree is taken as 200% when all of the carboxyl groups of the dicarboxylic acid are esterified. The amount of the monoalkyl ester grafted is 0.5 to 15% by weight. The grafted propylene-ethylene copolymer has an intrinsic viscosity [.eta.] of at least 0.3 and is dissolved in an amount of 10 to 100 kg per cubic meter of the organic solvent. The surface treating agent is suitable as an undercoat for a polyolefin shaped article.
    Type: Grant
    Filed: September 9, 1982
    Date of Patent: July 24, 1984
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Teiichi Shiomi, Kotaro Kishimura
  • Patent number: 4461806
    Abstract: A shaped article of a carbonaceous material characterized in that the carbonaceous material is impregnated with a borosilicate glass comprising 25 to 50 wt. % of SiO.sub.2 and 20 to 45 wt. % of B.sub.2 O.sub.3 as effective components.
    Type: Grant
    Filed: February 12, 1982
    Date of Patent: July 24, 1984
    Assignees: Agency of Industrial Science & Technology, Kyowa Carbon Co., Ltd., Toyo, Tanso Co., Ltd.
    Inventors: Shigeru Ikeda, Shozi Hori, Kiyohisa Eguchi, Kanji Matsuo, Hidenori Zaima, Yoshifumi Gamada, Teruhisa Kondo
  • Patent number: 4461586
    Abstract: An ink ribbon for use in electrothermic non-impact recording comprising an electroconductive base layer and an electroconductive thermal-transferable ink layer which are layered. The base layer comprises a binder resin and an electroconductive material dispersed uniformly in the binder resin, while the electroconductive thermal-transferable ink layer comprises a thermoplastic material and an electroconductive material uniformly dispersed in the thermoplastic material, with the surface resistivity .rho.b of the base layer being greater than the surface resistivity .rho.i of the ink layer, and the softening or melting point Tm1 of the binder resin in the base layer being higher than the softening or melting point Tm2 of the thermoplastic material in the ink layer.
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: July 24, 1984
    Assignee: Ricoh Company, Ltd.
    Inventors: Toshiyuki Kawanishi, Yukio Tabata
  • Patent number: 4461798
    Abstract: A metal-reinforced synthetic wood material which is composted of a metal assembly used for reinforcement, and synthetic resin for covering the metal assembly. The metal assembly is, for example, formed of a high-carbon special steel, and the synthetic resin is, for example, foamed polyurethane. This synthetic wood material is manufactured by a method, which method includes the steps of placing the metal assembly in a mold of a molding machine, and injecting the resin material into the mold in a reaction injection molding. Thus, the synthetic wood material having high moisture resistance and sufficient strength can be obtained.
    Type: Grant
    Filed: September 21, 1982
    Date of Patent: July 24, 1984
    Inventor: Takeshi Uchida
  • Patent number: 4457460
    Abstract: A wristwatch strap of leather or the like has a continuous non-porous barrier layer on the surfaces of the strap that contact the wrist of the wearer. The barrier layer consists of metal particles such as aluminum, noble metal or silver, having a particle size of 150 to 500 microns, preferably 200 to 350 microns, embedded in a matrix which consists of a synthetic resin. The barrier layer is effective to prevent the transfer of allergens and irritants from the material of the wristwatch strap, to the skin of the wearer.
    Type: Grant
    Filed: January 28, 1983
    Date of Patent: July 3, 1984
    Assignee: Hermann Hirsch Leder- und Kunststoffwarenfabrik
    Inventors: Hermann Hirsch, Reinhart Jarisch
  • Patent number: 4457962
    Abstract: An article is provided comprised of a thermotropic liquid crystalline polymer having an inherently weak weld line incorporated therein which renders the article suitable for use as a breakaway part.
    Type: Grant
    Filed: September 1, 1982
    Date of Patent: July 3, 1984
    Assignee: Celanese Corporation
    Inventors: Michael Jaffe, Zohar Ophir
  • Patent number: 4457967
    Abstract: A brake disc of carbon-carbon composite material comprising a substrate of a mixture of carbon fibres of two very different ranges of length and embedded in a carbon matrix. The longer fibres are oriented and distributed randomly in planes approximately parallel to the friction surfaces of the disc, and the shorter fibres are oriented and distributed randomly in the volume of the disc. The brake discs according to the invention are useful in particular in the aviation field. They can be made by ultrasonically molding a mixture of the fibres and a suitable liquid, followed by heat treatment; or by chemical deposition of carbon from the vapor phase.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: July 3, 1984
    Assignee: Le Carbone-Lorraine of Tour Manhattan
    Inventors: Jean-Louis Chareire, Guy Dupupet
  • Patent number: 4456651
    Abstract: An improved insulating sheath for an electrical conductor, which is impregnated with a hardenable impregnating resin and afterwards hardened, has alternating layers of porous support and thermostable plastic foil support tapes of inorganic sheet type insulating material. The two tape multiple layered sheath gives increased dielectric strength and heat resistance without impairing resin impregnation capacity.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: June 26, 1984
    Assignee: Siemens Aktiengesellschaft
    Inventors: Franz-Josef Pollmeier, Walter Ihlein
  • Patent number: 4455344
    Abstract: Granules containing 60 wt. % or more filler, having such particle size distribution that 90 wt. % or more granular particles have a particle size of (1/3)d.sub.50.sup.b to 3d.sub.50.sup.b (d.sub.50.sup.b : mean particle size of the granules), and being produced by blending (a) 60 to 90 parts by weight of a filler having a mean particle size of 0.05 to 100.mu., (b) 5 to 35 parts by weight of crystalline polyolefin powder having a mean particle size (d.sub.50.sup.a) of 150 to 1,000.mu. and having such particle size distribution that 90 wt. % or more particles thereof have a particle size of (1/2)d.sub.50.sup.a to 2d.sub.50.sup.a, (c) 5 to 35 parts by weight of a binder having a melting point lower than that of said crystalline polyolefin powder by a least 10.degree.C., and optionally, (d) a compounding additive, at a temperature lower than the melting point of the crystalline polyolefin powder and higher than the melting point of the binder, is disclosed.
    Type: Grant
    Filed: November 9, 1982
    Date of Patent: June 19, 1984
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Kiyoshi Matsuyama, Kenji Ochi, Hiroyuki Ogawa, Takatoshi Suzuki
  • Patent number: 4455334
    Abstract: A molded packing, comprising a volute laminate of a composite sheet material compressed into a unified annular form of rectangular cross-section. The composite sheet material is formed by unifying an expanded graphite sheet and a reinforcing core member, the laminated core facilitating insertion and removal of the packing and improving sealing performance. The composite sheet material may be formed by pressingly contacting one or two expanded graphite sheets to a core member. The core member may be formed from a metallic net, a metallic foil or a plurality of fine metallic threads.
    Type: Grant
    Filed: May 21, 1982
    Date of Patent: June 19, 1984
    Assignee: Nippon Pillar Packing Co. Ltd.
    Inventors: Kohzo Ogino, Tomikazu Shiomi, Yuichi Tanaka, Seichi Yamashita
  • Patent number: 4452843
    Abstract: Security papers with luminescing authenticity characteristics built in or printed thereon which absorb in the visible region of the optical spectrum but in the infrared have a transparent region in which the luminophore also emits. By the absorption in the visible undesired parasitic emissions are suppressed which would make the luminophore visually evident on corresponding excitation. For testing the authenticity of the document the emission is investigated in the infrared. Suitable luminophores are rare earth metal luminophores in suitable host lattices, particularly in ferrite lattices or garnet lattices, which contain transition metal ions as absorbing elements.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: June 5, 1984
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH.
    Inventors: Wittich Kaule, Gerhard Schwenk, Gerhard Stenzel
  • Patent number: 4451530
    Abstract: Security papers with luminescing authenticity features worked into them or printed on them. The authenticity features used consist of a luminophore and one or more absorbing materials by which the emission and/or the excitation spectrum of the luminophore is changed in detectable fashion. The dyestuff can be present as an admixture to the luminophore, as a coating of a luminophore layer or as a coating on luminophore powder grains. For checking the authenticity of documents the emission spectrum of the luminophore is not used but the change generated by the technology used in the emission or excitation spectra.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: May 29, 1984
    Assignee: GAO Gesellschaft fur Automation und Organisation mbH.
    Inventors: Wittich Kaule, Gerhard Schwenk, Gerhard Stenzel
  • Patent number: 4451521
    Abstract: Security paper with luminescing authenticity characteristics which after excitation with invisible light emit exclusively invisible light of different wavelengths as authenticity signal. The luminophores can be included in the printing ink used or they can be added to the paper material in the manufacture of the paper material. A corresponding test apparatus makes it possible to check the authenticity of the security paper in the presence of customers but unnoticed by them; thereby the invisibility of the test signal and the authenticity signal are taken advantage of and the test device is hidden behind a plate non-transmissive for visible light which however is transmissive for the test signal and for the authenticity signal.
    Type: Grant
    Filed: October 23, 1981
    Date of Patent: May 29, 1984
    Assignee: Gao Gesellschaft fur Automation und Organisation mbH
    Inventors: Wittich Kaule, Gerhard Stenzel
  • Patent number: 4448792
    Abstract: A pasteurizable, cook-in shrink bag is provided that comprises a first or sealing and food contact layer composed of propylene homopolymer or copolymer; a second or heat shrinkable layer composed of a blend of propylene homopolymer or copolymer and butylene homopolymer or copolymer; a third or adhesive layer composed of ethylene methacrylate copolymer; a fourth or barrier layer composed of vinylidene chloride copolymer; a fifth or adhesive layer as in said third layer; and a sixth or optical clarity layer as in said first layer; further provided that the foregoing bag structure is oriented and irradiated to a dose of about 4-12 megarads after orienting or alternatively, though less preferred, to about 6-12 megarads before orienting. Associated method for making said bag is also provided.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: May 15, 1984
    Assignee: W. R. Grace & Co., Cryovac Division
    Inventor: Henry G. Schirmer
  • Patent number: 4447494
    Abstract: An oriented multilayer heat sealable film structure comprising a polyolefin film substrate, a layer of a random copolymer of ethylene and propylene, a primer layer on said copolymer layer and a layer of heat sealable vinylidene chloride polymer on said primer layer. The method of preparing said structure includes aging said structure at a temperature and for a time resulting in increased heat seal strength.
    Type: Grant
    Filed: March 8, 1982
    Date of Patent: May 8, 1984
    Assignee: Mobil Oil Corporation
    Inventors: John R. Wagner, Jr., Carl C. Hein
  • Patent number: 4447493
    Abstract: A constrained-layer construction comprising a stiff layer or substrate and a layer of a viscoelastic polymer which is the reaction product of (a) 25 to 75 weight percent of an acryloyl or methacryloyl derivative of at least one oligomer, said oligomer having a glass transition temperature of less than 25.degree. C. and a molecular weight per oligomer of 600 to 20,000, and (b) 75 to 25 weight percent of a copolymerizable monomer whose homopolymer has a glass transition temperature of at least 50.degree. C., the copolymer being suitable for damping vibrations at relatively high temperatures, e.g., 50.degree.-150.degree. C., is disclosed. Also included is a process for damping vibrations in component parts of devices used in automotive, aerospace, and computer industries.
    Type: Grant
    Filed: July 26, 1982
    Date of Patent: May 8, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: William A. Driscoll, Steven M. Heilmann, Jerald K. Rasmussen