Patents Examined by C. Melissa Bonner
  • Patent number: 5891815
    Abstract: Multiphase ceramic composites containing 47% to 52% by weight aluminum nitride, 23% to 27% by weight silica, 3% to 7% alumina and the balance boron nitride wherein the boron nitride is one phase in the composition and the reaction products of aluminum nitride, silica and alumina are the other phase in the composite. The boron nitride phase is uniformly distributed in the form of discrete particles throughout the reaction products of aluminum nitride, silica and alumina. A window transparent to electromagnetic radiation in a predetermined frequency spectrum is made by forming a homogeneous, finely-divided mixture of the foregoing composite and compacting the homogeneous, finely-divided mixture at an elevated temperature and pressure for a sufficient time to form reaction products of the aluminum nitride, silica and alumina. In preferred embodiments, the homogeneous, finely-divided mixture of aluminum nitride, silica, boron nitride and alumina is densified at a temperature of 1760.degree. C.
    Type: Grant
    Filed: December 21, 1988
    Date of Patent: April 6, 1999
    Assignee: Lockheed Martin Corporation
    Inventors: Gerald C. Dodds, Richard A. Tanzilli
  • Patent number: 5624602
    Abstract: The maintenance of a fluorescent lamp containing terbium-activated cerium magnesium aluminate phosphor is improved by combining the phosphor with a small particle size aluminum oxide and wet-milling the phosphor/aluminum oxide mixture before applying the phosphor to the interior of a fluorescent lamp envelope.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: April 29, 1997
    Assignee: Osram Sylvania Inc.
    Inventors: Joseph J. Lenox, Richard I. Manahan
  • Patent number: 5529981
    Abstract: The present invention discloses a process and apparatus for forming textures in materials. It uses so called "normal aligners" having an anisotropy in the paramagnetic susceptibility within a magnetic field having compositions REBa.sub.2 Cu.sub.3 O.sub.x or Bi(Tl).sub.2 Sr.sub.2 Ca.sub.1-y RE.sub.y Cu.sub.2 O.sub.x, where RE=Eu, Er, Tm, and Yb. One version of the process for preparing bulk and elongated objects comprises two steps. In the first step the material is uniaxially aligned. In the second step uniaxially aligned material is heated to a temperature approaching its melting point while a magnetic field of at least 10.sup.4 Oe, with a direction perpendicular to the axis of uniaxial alignment is simultaneously applied. The process results in biaxially, highly textured bulk and elongated materials.
    Type: Grant
    Filed: July 20, 1993
    Date of Patent: June 25, 1996
    Inventor: Alex Holloway
  • Patent number: 5512210
    Abstract: A far-red emitting phosphor for cathode ray tubes used in liquid crystal light valves comprises Y.sub.3-y Gd.sub.y Al.sub.5-x Ga.sub.x -O.sub.12 :A, where x ranges from 0 to 5, y ranges from 0 to 3, and A is selected from the group consisting of chromium, iron, vanadium, neodymium, dysprostum, cobalt, nickel, titanium or combination thereof.
    Type: Grant
    Filed: December 21, 1993
    Date of Patent: April 30, 1996
    Inventors: Esther Sluzky, Mary A. Lemoine, Kenneth R. Hesse
  • Patent number: 5512194
    Abstract: There are provided acicular berthollide particles comprising crystalline particles expressed by the formula FeOx (1.33.ltoreq.x<1.5) and modified with a specific amount of zinc ions and a process producing the same which comprises the steps of oxidizing acicular magnetic iron oxide particles expressed by the formula FeOx (1.0<x<1.33) and modified with a specific amount of zinc ions which are produced by (a) heating and dehydrating acicular hydrous iron oxide particles containing a specific amount of a zinc component, reducing, and heating the particles under specific conditions, or (b) reducing acicular iron oxide particles containing a specific amount of a zinc component and heating the particles under specific conditions, or (c) heating acicular magnetic iron oxide particles expressed by the formula FeOx (1.0<x<1.33) containing a specific amount of zinc ions under specific conditions.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: April 30, 1996
    Assignee: Ishihara Sangyo Kaisha, Ltd.
    Inventors: Makoto Ogasawara, Masakazu Yada, Kaoru Sakurai, Kazuya Haga, Masahide Miyashita, Yasumasa Hirai
  • Patent number: 5512196
    Abstract: A material which possesses both capacitive and inductive properties for suppressing electromagnetic interference is provided, wherein the material is a composite of a ferroelectric material and a ferromagnetic material. The ferroelectric-ferromagnetic composite material is formulated and processed so as to retain the distinct electrical properties of the individual constituents according to the relative quantities of the constituents present in the ferroelectric-ferromagnetic composite material. As a unitary composite element, the ferroelectric-ferromagnetic composite is readily formable to provide a compact electrical filter whose filtering capability is highly suitable for suppressing electromagnetic interference from sources internal and external to an automotive environment. The sintered composite has a very low porosity; interconnectivity between the ferroelectric and ferromagnetic phases; and has no chemical reaction between the ferroelectric and ferromagnetic phases to produce a third phase.
    Type: Grant
    Filed: June 27, 1994
    Date of Patent: April 30, 1996
    Assignee: General Motors Corporation
    Inventors: Joseph V. Mantese, Adolph L. Micheli, Dennis F. Dungan
  • Patent number: 5508257
    Abstract: Superconducting composite comprising a matrix made of superconducting sintered mass composed of perovskite type or quasi-perovskite type oxide and metal phase dispersed in the superconducting mass with a proportion of from 10 to 70 volume % with respect to said composite. The metal phase may consist of at least one of Cu, Ag, Au, Pt, Ni and Zn or their alloys. The superconducting sintered mass may be Ba-Y-Cu-O type compound oxide.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: April 16, 1996
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kenichiro Sibata, Takeshi Yamaguchi, Shuji Yazu, Tetsuji Jodai
  • Patent number: 5505870
    Abstract: There are a piezoelectric ceramics-polymer composite material and a method for the preparation of the same which comprises10 to 60% by volume of silane-coated PZT piezoelectric ceramics powder based on the total volume of the composition;at most 3% by volume of carbon powder based on the total volume of the composition; andbalance volume of PVdF piezoelectric polymer.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: April 9, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Kwang Soo Yoo, Hyung Jin Jung, Han Sang Song, Hyun Nam Cho
  • Patent number: 5503770
    Abstract: Disclosed is a fluorescent compound of a molecular structure comprising a fluorophore, at least one phenylboronic acid moiety, and at least one amine-providing nitrogen atom where the nitrogen atom is disposed in the vicinity of the phenylboronic acid moiety so as to interact intermolecularly with the boronic acid. The compound emits fluorescence of a high intensity upon binding to saccharide(s), and is therefore suitable for use in the detection of saccharide(s).
    Type: Grant
    Filed: November 7, 1994
    Date of Patent: April 2, 1996
    Assignee: Research Development Corporation of Japan
    Inventors: Tony James, Saman Sandanayake, Seiji Shinkai
  • Patent number: 5503769
    Abstract: A method of making an unactivated yttrium tantalate x-ray phosphor containing an aluminum additive wherein a high brightness phosphor is obtained without the use of a lithium chloride containing flux. The method includes using a high surface area aluminum oxide as the source of the aluminum additive and a lithium sulfate flux.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 2, 1996
    Assignee: Osram Sylvania Inc.
    Inventors: Kenneth T. Reilly, Richard G. W. Gingerich, Richard R. Borchardt
  • Patent number: 5504045
    Abstract: A paint composition containing as a major portion a flux composition including a first flux containing silica, alkali oxide, zinc oxide and boron oxide but containing no lead or lithium and optionally a second flux, and minor portions of pigment and a liquid medium, particularly suited for automobile windshields.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: April 2, 1996
    Assignee: The O. Hommel Company
    Inventors: Hasan B. Emlemdi, Robert M. Koceski, Harold C. Kersteen, Robert A. Prunchak, Matthew Sgriccia
  • Patent number: 5501727
    Abstract: A curable dental composition comprising an ethylenically unsaturated moiety, an oxidizing agent and metal complexed ascorbic acid is claimed. The incorporation of metal complexed ascorbic acid provides a curable composition that exhibits improved color stability. The metal complexed ascorbic acid is particularly useful as a component of a paste:paste glass ionomer dental cement.
    Type: Grant
    Filed: February 28, 1994
    Date of Patent: March 26, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Bing Wang, Sumita B. Mitra
  • Patent number: 5501728
    Abstract: The present invention relates to a friction material for use in manufacturing various friction bearing components such as brakes, clutches, couplings, transmission systems and the like. The composition of the friction material includes a base friction material and a metal sulfide-iron powder alloy mixture which is added to the base material and further mixed prior to compression molding the desired component.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: March 26, 1996
    Assignee: Brake Pro, Inc.
    Inventors: Christopher C. Shepley, David R. Carter
  • Patent number: 5501808
    Abstract: Transition metal compounds of a crystalline-like structure are provided having unique electrical properties. The compounds comprising nickel have been shown to have ferromagnetic behavior which is induced or enhanced by exposure to electromagnetic radiation and heat. The compounds are identified by characteristic peaks in the infrared spectra and X-ray powder diffraction spectra. The spectra suggest the compounds have a planar structure of the empirical formula M(X).sub.(4-Y)/X M.sub.C (Y)C.sub.4 or a three-dimensional structure of empirical formula M(X).sub.(6-Y)/X M.sub.C (Y)C.sub.6, wherein M.sub.C (Y) is the transition metal, with Y being its ionic state, and M(X) is the counter cation with X being its ionic state.
    Type: Grant
    Filed: April 18, 1994
    Date of Patent: March 26, 1996
    Inventor: Philip Patalano
  • Patent number: 5501724
    Abstract: A coating composition for the attenuation of the reflection electromagnetic radiation and particularly electromagnetic radiation have a wavelength of greater than 800 nm including the near infrared is described. The composition comprises a chromophore capable of absorbing up to about 95% of the electromagnetic radiation having a wavelength greater than 800 nm. Optionally, the composition may comprise microbeads that serve the purpose of also scattering the electromagnetic radiation.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: March 26, 1996
    Inventor: Howard Loff
  • Patent number: 5500141
    Abstract: A magnetic ink concentrate essentially consisting of a dispersion of superparamagnetic solid particles in water or alcohol in the presence of a dispersant, and a process for its preparation.
    Type: Grant
    Filed: September 13, 1994
    Date of Patent: March 19, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Claudius Kormann, Ekkehard Schwab, Friedrich-Wilhelm Raulfs, Karin H. Beck
  • Patent number: 5498360
    Abstract: Manganese dry cells sorted out of used-up dry cells are crushed and sieved to obtain a mixture composed predominantly of anodic substances, which is in turn used for ferrite production. The invention is preferable for a saving of resources and preservation of the environment, and enables ferrites on a practical-enough level to be obtained.
    Type: Grant
    Filed: June 30, 1994
    Date of Patent: March 12, 1996
    Assignees: Nomura Kohsan Co., Ltd., TDK Corporation
    Inventors: Takashi Kanemaru, Takaaki Iwasaki, Toshio Saito, Shigeaki Suda, Takeo Kitagawa
  • Patent number: 5498369
    Abstract: The invention relates to a method of manufacturing ZnS particles by wet-chemical precipitation from aqueous zinc salt solutions, ZnS being precipitated onto nuclei introduced into the solution. Nuclei of a controlled particle size and particle size distribution are obtained in that the nuclei of the aqueous precipitation solution are added in the form of a water-soluble organosol which contains the nuclei.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: March 12, 1996
    Assignee: U.S. Philips Corporation
    Inventors: Michael Bredol, Jacqueline Merikhi, Cornelis Ronda
  • Patent number: 5498361
    Abstract: For the purpose of improving the initial magnetic permeability of manganese-zinc system ferrite in the high-frequency band of 10 kHz to 500 kHz, a manganese-zinc system ferrite comprising 50-56 mol % of Fe.sub.2 O.sub.3, 22-39 mol % of MnO, and 8-25 mol % of ZnO is fired after adding thereto up to 800 ppm calculated as Bi.sub.2 O.sub.3 of a bismuth oxide component and up to 1,200 ppm calculated as MoO.sub.3 of a molybdenum oxide component in admixture. It has an average grain diameter of from 5 to 50 .mu.m.
    Type: Grant
    Filed: August 8, 1994
    Date of Patent: March 12, 1996
    Assignee: TDK Corporation
    Inventors: Atsuhito Matsukawa, Shoji Inoue
  • Patent number: 5494593
    Abstract: Water-dilutable, amphoteric-surfactant-containing wax compositions (P) comprising as wax (W) an oxidized and optionally partially saponified hydrocarbon wax or a mixture of such waxes and as surfactant (A.sub.1) at least one amphoteric surfactant that contains one polyethyleneglycolether chain and optionally further surfactants and additions, are excellently suitable as softeners of high hydrophilicity, which are highly compatible with optical brighteners and synthetic resin finishes.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: February 27, 1996
    Assignee: Clariant Finance (BVI) Limited
    Inventor: Eckart Schleusener