Patents Examined by Brian M. Bolam
  • Patent number: 5171419
    Abstract: The present invention disclosed metal-coated fibers and metal matrix composites made therefrom comprising metal-coated carbon or graphite fiber which have a layer of CoW or NiW alloy interposed between the fiber and its outer metal layer.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: December 15, 1992
    Assignee: American Cyanamid Company
    Inventors: Nea S. Wheeler, David S. Lashmore
  • Patent number: 5169514
    Abstract: A gold or gold alloy plating composition comprises: a source of gold ions such as potassium gold (I) cyanide; optionally a source of alloying metal (e.g. nickel or cobalt) ions, for example as a sulphate; optionally a complexing agent for the alloying metal ions if present, such as citic acid or oxalic acid; and a rate promoting additive compound of general formula IA or IB: ##STR1## wherein: each of R.sup.1 and R.sup.2 independently represents a hydrogen or halogen atom or a formyl, carbamoyl, C.sub.1-4 alkyl, amino, phenyl or benzyl group, wherein the alkyl, phenyl and benzyl moieties may optionally be substituted with one or more hydroxy or amino groups or halogen atoms;R.sup.3 represents a C.sub.1-6 alkylene radical which may optionally be hydroxylated; andQ represents --SO.sub.2 -- or --CO--.
    Type: Grant
    Filed: February 19, 1991
    Date of Patent: December 8, 1992
    Assignee: Enthone-OMI, Inc.
    Inventors: Jan J. M. Hendriks, Gerard A. Somers, Henrica M. H. van der Steen
  • Patent number: 5169620
    Abstract: An improved method of manufacturing superfine iron oxide particles by introducing a gas mixture of a non-oxidizing gas and an iron-containing compound into a stream of heated oxidizing gas, wherein the improvement resides in the use of an insulated injector to introduce the gas mixtures into the heated oxidizing gas stream.
    Type: Grant
    Filed: November 27, 1990
    Date of Patent: December 8, 1992
    Assignee: United Technologies Corporation
    Inventors: Thomas P. Rudy, Forrest R. Goodson
  • Patent number: 5167946
    Abstract: Diaryl carbonates are prepared by the catalyzed reaction of an aryl hydroxide with a carbonyl halide in the liquid phase at a temperature from greater than 100.degree. to less than 150.degree. C.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: December 1, 1992
    Assignee: The Dow Chemical Company
    Inventors: Michael J. Mullins, Rafael Galvan, Thomas A. Chamberlin
  • Patent number: 5167782
    Abstract: A method for treating fluid hydrocarbon fuel to improve the combustion characteristics of the fuel. The method comprises applying a controlled electromotive force to an alloy which is in contact with the fuel. The electromotive force builds up an electrical charge in the alloy.
    Type: Grant
    Filed: March 27, 1991
    Date of Patent: December 1, 1992
    Inventor: John R. Marlow
  • Patent number: 5165910
    Abstract: A compact manufacturing method of an aqueous stabilized chlorine dioxide comprising adding to an aqueous 0.1-5% alkali metal chloride solution an aqueous alkali metal hypochlorite solution at 5-40 ppm, while before and after the addition of the hypochlorite solution an organic acid such as citric acid or an inorganic acid such as hydrochloric acid is used to adjust pH to 7-9 or 2-5.6, respectively, which is useful as disinfectant or deodorant.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: November 24, 1992
    Assignee: Sekisui Kaseihin Kogyo Kabushiki Kaisha
    Inventors: Kikuo Oikawa, Yasushi Hayashi
  • Patent number: 5164069
    Abstract: An aqueous acid electroplating solution comprising nickel ions and one or more acetylenic compounds, specifically mono- and polyglyceryl ethers of acetylenic alcohols; acetylenic compounds useful in the electroplating solution; and processes using such solution and compounds. The invention is particularly useful for nickel plating an irregular surface such as a printed circuit board having through-holes.
    Type: Grant
    Filed: November 5, 1990
    Date of Patent: November 17, 1992
    Assignee: Shipley Company Inc.
    Inventor: Edward J. Cerwonka
  • Patent number: 5160423
    Abstract: The present invention relates to a nickel plating solution to which a salt of an element in Group IIa in the periodic table is added, a method of copper-nickel-chromium or nickel-chromium bright electroplating and a film obtained by such a plating method. The nickel plating film is a bright electroplating film having excellent corrosion resistance.
    Type: Grant
    Filed: October 30, 1990
    Date of Patent: November 3, 1992
    Assignee: Kanto Kasei Co., Ltd.
    Inventor: Hiroshi Yokoi
  • Patent number: 5160592
    Abstract: According to the proposed method a moving substrate is transported through plurality of zones of treatment by plasma flows, arranged parallel to the moving substrate. Plasma flows are produced in each treatment zone in individual regions, a plasma-forming gas being supplied into the gaps between the adjacent regions and directed to the surface of the moving substrate. These gaps between adjacent regions are produced by electric potentials, equal in magnitude and similar in polarity, of electrodes used to generate plasma flows of adjacent regions. In a device realizing the method, pairs of electrodes used to form individual treatment regions are arranged so that any two adjacent pairs have their like electrodes facing each other, plasma-forming gas feed nozzles being fit in the gaps between said electrodes.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: November 3, 1992
    Assignee: Ivanovsky Nauchno-Issledovatelsky Experimentalno-Konstruktorsky Institut
    Inventors: Valentin M. Spitsin, Evgeny V. Karetnikov, Sergei F. Grishin, Andrei A. Ivanov, Boris L. Gorberg
  • Patent number: 5154911
    Abstract: A process for the efficient production of Cl.sub.2 from gaseous HCl, using a catalyst containing a transition metal oxide, an alkali metal chloride, and, optionally, a trivalent rare earth chloride, operates efficiently at moderate temperatures and without volatilization of the catalyst. The process comprises two steps: (1) a chloridizing step in which the HCl is contacted with the catalyst at an elevated temperatures, converting the transition metal oxide to a transition metal chloride with elimination of water; and (2) an oxidizing step in which the transition metal chloride produced in the first step is contacted with a source of oxygen at a temperature at least about 300.degree. C. but less than 400.degree. C. and sufficiently high that Cl.sub.2 is evolved and the transition metal chloride is reconverted to a transition metal oxide. The temperature of the oxidizing step is increased over that of the chloridizing step. Preferably, the transition metal oxide is MnO.sub.2, in which case the MnO.sub.
    Type: Grant
    Filed: April 24, 1991
    Date of Patent: October 13, 1992
    Assignee: University of Southern California
    Inventors: Sidney W. Benson, Mohamed W. M. Hisham
  • Patent number: 5154910
    Abstract: A process for the production of essentially chlorine free chlorine dioxide whereby a flow of chlorine dioxide obtained from reduction of alkali metal chlorate and containing by-product of chlorine gas is absorbed in water and the chlorine gas is treated with formic acid in the water solution. The formic acid is added in an amount resulting in a mole ratio formic acid to chlorine gas of >1:1.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: October 13, 1992
    Assignee: Eka Nobel AB
    Inventor: Jorgen Engstrom
  • Patent number: 5152879
    Abstract: The bonding properties of polyolefin films in composites are improved by a treatment with a low pressure plasma.
    Type: Grant
    Filed: December 27, 1990
    Date of Patent: October 6, 1992
    Assignee: Wolff Walsrode AG
    Inventors: Siegfried Thurm, Ulrich Reiners, Ingo Schinkel, Manfred Kowitz
  • Patent number: 5151170
    Abstract: For acid copper plating baths containing a brightener used to produce smooth copper coatings of high brilliancy, it has been found that the "break-in" period normally needed after a brightener is added to the plating bath, has been virtually eliminated by use of the brightener of this invention. This brightener consists essentially of a peroxide oxidation product of a dialkylamino-thioxomethyl-thioalkanesulfonic acid wherein each alkyl and alkane group individually contains 1 to 6 carbon atoms and wherein the peroxide oxidation of the dialkylamino-thioxomethyl-thioalkane-sulfonic acid is carried out in an acid, aqueous medium having a pH of not more than about 1. In an added embodiment of this invention the acid copper plating bath also contains hydrolysis products of the peroxide oxidation product of a dialkylamino-thioxomethyl-thioalkanesulfonic acid.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: September 29, 1992
    Assignee: McGean-Rohco, Inc.
    Inventors: Eda R. Montgomery, Randal D. King
  • Patent number: 5149420
    Abstract: A method for plating palladium on Group IV-B and V-B metals, particularly niobium, vanadium, zirconium, titanium and tantalum as pure metals and as alloys is described. The method provides the metal to be plated with a roughened exposed surface to be plated which has been electrolytically hydrided and then the surface is plated using electroless or electrolytic plating. Hydride is removed from the plated surface, usually by heating. This also removes other surface impurities and aids the coat adhesion. The resulting palladium plated metal articles are usful for hydrogen extraction.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: September 22, 1992
    Assignee: Board of Trustees, operating Michigan State University
    Inventors: Robert E. Buxbaum, Peter C. Hsu
  • Patent number: 5147515
    Abstract: A method for forming a ceramics film on the surface of a substrate comprises performing spark discharge in an electrolytic bath, wherein the electrolytic bath comprises an aqueous solution of a water-soluble or colloidal silicate and/or an oxyacid salt to which ceramics fine particles and/or specific fine particles are dispersed and the spark discharge is carried out in the electrolytic bath while ensuring the suspended state of the ceramics particles and/or the specific fine particles in the electrolytic bath. The method makes it possible to effectively form, on the surface of a metal substrate, ceramics films having a variety of color tones as well as excellent insulating properties and hardness. Moreover, it further makes it possible to effectively form a composite ceramics film having excellent wear resistance on the surface of a metal substrate.
    Type: Grant
    Filed: August 28, 1990
    Date of Patent: September 15, 1992
    Assignee: Dipsol Chemicals Co., Ltd.
    Inventors: Haruo Hanagata, Tsukasa Suzuki, Kazuo Yanagida, Hidesato Igarashi
  • Patent number: 5145656
    Abstract: Geothermal brine is passed through a zone containing a packing metal so as to reduce its tendency to deposit iron/silica scale, reduce corrosivity of the brine, and/or remove and recover metals from the brine. The method polished the geothermal brine by contacting the brine with a packing metal higher in the electromotive series than silver for a time sufficient for a precious metals to precipitate onto the packing at brine temperature and pH conditions which inhibit iron-rich silica scale. Most preferably, the contacting is accomplished near an injection well at the end of a heat extraction process and the packing comprises coiled zinc-galvanized steel chicken wire mesh packed in a sufficient density to also act as a filter for suspended particles. Alternatively, contacting is also accomplished near the production well. Dissolving the packing in a suitable acid leaves a precious metal-rich residue behind for subsequent recovery.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: September 8, 1992
    Assignee: Union Oil Company of California
    Inventors: Darrell L. Gallup, Allen W. Doty, Morton M. Wong, Charles F. Wong, John L. Featherstone, Jessie P. Reverente, Philip H. Messer
  • Patent number: 5143593
    Abstract: A method of copper-plating a material whereby electrolysis is performed using an electrolytic plating cell including a diaphragm which separates an anode chamber having therein an insoluble metal electrode as an anode from a cathode chamber having therein the material to be plated as a cathode, and further using an electrolyte solution containing copper ions and an additive, wherein the electrolyte is fed to the cathode chamber in a manner such that the copper ion concentration in the electrolyte within the cathode chamber is kept constant and electrolyte is further fed to the anode chamber at a rate of from about 0.2 to 11 ml/KAh.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: September 1, 1992
    Assignee: Permelec Electrode Ltd.
    Inventors: Kenichi Ueno, Kazuhiro Hirao, Genzo Yamane
  • Patent number: 5139636
    Abstract: Process for electroplating and apparatus therefor characterized by guiding just released bubbles to rise up symmetrically between the substrate plate and each of the anode plates so as to cause stable rising currents; providing a pair of passages outside of the bath so as to receive the bath solution overflowing above the upper edges of the bath wall to be jointed with the respective rising currents near the bath bottom; and preventing the descending and turning currents from disturbing just released bubbles near the joint positions of the descending and rising currents.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: August 18, 1992
    Inventors: Hironari Sawa, Kazunari Sawa, Norinari Sawa
  • Patent number: 5130113
    Abstract: Aluminum hydroxide having a particle size of 2 to 30 .mu.m and having small specific surface area and low resin filling viscosity can be prepared by using precipitated aluminum hydroxide composed of secondary agglomerated particles having a primary particle size almost equal to the desired average particle size of intended pulverized aluminum hydroxide as the starting material to be pulverized and pulverizing this starting aluminum hydroxide. This aluminum hydroxide has an average particle size of 2 to 30 .mu.m, a surface roughness coefficient Sr/Sc (in which Sr represents the specific surface area of particles measured by the nitrogen adsorption method and Sc represents the specific surface area calculated from the size of particles approximated to spheres while taking the particle size distribution of particles into consideration) smaller than 2.5 and a linseed oil absorption smaller than 30 cc/100 g as determined according to JIS K-5101.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: July 14, 1992
    Assignee: Showa Denko K.K.
    Inventors: Mikito Kitayama, Kazuyuki Yokoo, Yukio Oda, Yasuo Kawai, Mitsuhiko Morihira, Osamu Morooka, Yuji Shibue
  • Patent number: 5130108
    Abstract: A process for producing a natural gas condensate having a reduced amount of mercury from a mercury-containing natural gas wellstream, wherein the wellstream is first separated into gaseous and liquid fractions. The treatment of the gaseous fraction includes treatment with a carbonate solution which, upon regeneration, yields an acid gas which is mixed with the liquid fraction. The mixture is then separated from gaseous components and filtered.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: July 14, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Costandi A. Audeh, Barry E. Hoffman