Patents Examined by David W. Schumaker
  • Patent number: 5104746
    Abstract: A method for contraction annealing niobium-tin wire is disclosed. An improved niobium-tin wire is provided by loosely winding the wire on a mandrel, or by coiling the wire on a circumferentially retractile mandrel, and contraction annealing the wire without reaction-forming substantial amounts of Nb.sub.3 Sn. Such contraction annealing allows the wire to contract in length unconstrained thereby preventing the formation of internal tensile stresses in the wire and its surrounding insulation. Prevention of internal stresses in the wire greatly reduces the susceptibility of the wire to breakage, cracking, sintering, shorting, tin leakage, or substantial shifting of the wire from desired wrap positions when it is reaction annealed to form the brittle super-conducting intermetallic compound Nb.sub.3 Sn.
    Type: Grant
    Filed: May 4, 1990
    Date of Patent: April 14, 1992
    Assignee: General Electric Company
    Inventors: Alan I. Taub, Mark L. Miller
  • Patent number: 5085945
    Abstract: A method of manufacturing a metal matrix composite material containing high thermal stability polymer fibers, comprising the steps of: (1) providing high thermal stability polymer fibers; (2) providing a liquid-phase metal; (3) mixing the liquid-phase metal and the high thermal stability fibers; and (4) allowing the liquid-phase metal to solidify and form a metal matrix composite.
    Type: Grant
    Filed: August 14, 1990
    Date of Patent: February 4, 1992
    Assignee: Aluminum Company of America
    Inventors: David I. Yun, Que-Tsang Fang, Caroline Wei-Berk
  • Patent number: 5082625
    Abstract: Herein disclosed, as a Ni-based corrosion-resistant alloy to be used for build-up welding, is an alloy which contains 0.5 to 2.3 wt % of copper, 0.1 to 5.3 wt % of molybdenum, 1.0 to 29.0 wt % of at least one carbide forming element except molybdenum, 1.0 to 30.0 wt % of iron, 0.6 to 2.5 wt % of silicon, 0.008 up to 1.0 wt % of boron, and 0.04 to 1.6 wt % of carbon, the remainder being composed of nickel and incidental impurities.
    Type: Grant
    Filed: December 6, 1989
    Date of Patent: January 21, 1992
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sinji Kato, Soya Takagi, Minoru Kawasaki, Kazuhiko Mori, Katsuhiko Ueda
  • Patent number: 5081102
    Abstract: A spray calcination process is provided for decomposing a metal nitrate solution to form fine grain multicomponent metal oxide powders of selected composition of particular utility as superconductor precursor powders. Such precursor powders are produced in bulk quantities as high purity, reproducible, intimately mixed powders for conversion to high temperature superconductors.A metal nitrate solution containing two or more metal constituents in a preselected ratio is sprayed as a finely atomized spray into a spray calcination zone where it is contacted with a hot gas stream for a residence time of less than 15 seconds at a high temperature between 200.degree. C. and 1100.degree. C. sufficient to vaporize the water of the nitrate solution and convert the metal nitrates to their corresponding oxides.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: January 14, 1992
    Assignee: Rockwell International Corporation
    Inventors: Richard L. Gay, LeRoy F. Grantham
  • Patent number: 5078807
    Abstract: Magnesium base metal alloy sheet is produced by rolling the rolling stock extruded or forged from a billet at a temperature ranging from 200.degree. C. to 300.degree. C. The billet is consolidated from rapidly solidified magnesium based alloy powder that consists of the formula Mg.sub.bal Al.sub.a Zn.sub.b X.sub.c, wherein X is at least one element selected from the group consisting of manganese, cerium, neodymium, praseodymium, and yttrium, "a" ranges from about 0 to 15 atom percent, "b" ranges from about 0 to 4 atom percent, "c" ranges from about 0.2 to 3 atom percent, the balance being magnesium and incidental impurities, with the proviso that the sum of aluminum and zinc present ranges from about 2 to 15 atom percent. The alloy has a uniform microstructure comprised of fine grain size ranging from 0.2-1.0 .mu.m together with precipitates of magnesium and aluminum containing intermetallic phases of a size less than 0.1 .mu.m.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: January 7, 1992
    Assignee: Allied-Signal, Inc.
    Inventors: Chin-Fong Chang, Santosh K. Das
  • Patent number: 5077005
    Abstract: There is provided a high-conductivity copper alloy with excellent workability and heat resistance, characterized by the alloy consists essentially of, by weight, at least one element selected from the group consisting of______________________________________ 10-100 ppm In (indium), 10-1000 ppm Ag (silver), 10-300 ppm Cd (cadmium), 10-50 ppm Sn (tin), 10-50 ppm Sb (antimony), 3-30 ppm Pb (lead), 3-30 ppm Bi (bismuth), 3-30 ppm Zr (zirconium), 3-50 ppm Ti (titanium) and 3-30 ppm Hf (hafnium), ______________________________________and the balance copper. S (sulfur) and O (oxygen) as unavoidable impurities are controlled to amounts of less than 3 ppm S, and less than 5 ppm O, respectively. Other unavoidable impurities are controlled to less than 3 ppm in total amount. The alloy is very suitable for applications such as forming magnet wires and other very thin wires, lead wires for electronic components, lead members for tape automated bonding (TAB) and the like, and members for printed-circuit boards.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: December 31, 1991
    Assignee: Nippon Mining Co., Ltd.
    Inventor: Masanori Kato
  • Patent number: 5073210
    Abstract: A method of making material in the form of a fine wire or thin strip or sheet suitable for use as electrical conductors comprises: forming an ingot substantially consisting of an alloy of gold and one or more of the metals titanium, lutetium, zirconium, scandium and hafnium, the amount of the or each of said one or more of the metals in the alloy lying in the range from substantially 0.1 at % to an upper limit comprising the atomic percentage of that metal corresponding to the maximum solubility of that metal in the alloy; solution heat treating the ingot and then quenching the ingot from the solution heat treatment temperature; mechanically working the ingot to have a maximum dimension in at least one direction of not greater than 250 .mu.m; and heat treating the resulting material at a temperature below its solvus temperature from an ambient atmosphere containing oxygen and/or nitrogen in the ambient atmosphere.
    Type: Grant
    Filed: May 22, 1990
    Date of Patent: December 17, 1991
    Assignee: The General Electric Company, p.l.c.
    Inventors: Giles Humpston, David M. Jacobson
  • Patent number: 5066545
    Abstract: Polyimide-metal laminates are formed by etching the surfaces of a polyimide web with a glycol-containing etchant followed by electroless nickel or cobalt deposition and then by copper deposition. The glycol-containing etchant can be utilized to form through holes through the web.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: November 19, 1991
    Assignee: Polyonics Corporation
    Inventor: Daniel R. Walsh
  • Patent number: 5064611
    Abstract: An improved method for producing a copper alloy, wherein a molten metal consisting essentially of 1.0 to 8% by weight of Ni, 0.1 to 0.8% by weight of P, 0.06 to 1.0% by weight of Si, and a remainder of Cu and unavoidable impurities (or a molten metal consisting essentially of 1.0 to 8% by weight of Ni, 0.1 to 0.8% by weight of P, 0.06 to 1.0% by weight of Si, 0.03 to 0.5% by weight of Zn, and a remainder of Cu and unavoidable impurities) is quenched to solidify, at a cooling rate in the range from 10.sup.2 .degree. C./sec. to 10.sup.5 .degree. C./sec., and continuously cooling in succession said solidified metal to a normal temperature, to cause an intermetallic compound of Ni-P and Ni-Si to be finely and uniformly dispersed into the matrix material.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: November 12, 1991
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kimio Hashizume, Keizo Kitakaze, Takefumi Itou
  • Patent number: 5063118
    Abstract: The abrasive dental strip for teeth and teeth fillings is formed of a foil-like metal strips solidified from a melt and containing a homogeneous metal matrix in which hard particles such as zeta-chromium boride particles are fixed. The strip is easy to manufacture and provides increased protection against loosening of the hard particles from the strip during use.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: November 5, 1991
    Assignee: Sulzer Brothers Limited
    Inventor: Roland Goetz
  • Patent number: 5061573
    Abstract: The metal strip which is made in the form of a foil has hard particles in the form of plenary deposits from a melt included in a metal matrix which has solidified in vitreous form and/or which is microcrystalline. At least 50% of the hard particles have a skeletal crystal shape with a length to width ratio of at least 5. The hard particles are securely adhered within the metal strip.
    Type: Grant
    Filed: January 25, 1989
    Date of Patent: October 29, 1991
    Assignee: Sulzer Brothers Limited
    Inventors: Hans-Walter Schlapfer, Bruno Sonderegger, Werner Straub
  • Patent number: 5059492
    Abstract: This invention provides a highly corrosion-resistant, colored thin film-coated steel sheet having excellent press-processability and spot-weldability, which comprises a plated steel sheet, a first layer of a sparingly soluble chromate film formed on surface(s) of the plated steel sheet and having a water soluble content of 1 to 30%, a Cr.sup.6+ /Cr.sup.3+ ratio of 0.01 to 1.0 and a total chromium build-up of 10 to 150 mg/m.sup.2 on one surface, and a second layer of a 0.3 to 5 .mu. thick solid coating film formed of an organic solvent-type coating composition, the solid coating film being comprised, based on the weight of the nonvolatile content, of(a) a urethanated epoxy ester resin having a number average molecular weight of 300 to 100,000: 30 to 90%,(b) a hydrophilic polyamide resin having a polymerization degree of 50 to 1,000: 5 to 40%,(c) a silica powder having an average particle diameter of 1 to 100 .mu.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: October 22, 1991
    Assignee: Nippon Steel Corporation
    Inventors: Yoshio Shindou, Motoo Kabeya
  • Patent number: 5057274
    Abstract: A die cast, heat treated shaped aluminum silicon alloy article consisting essentially of, based on an alloy weight, from 13 or 25 wt % silicon, from 2 to 6 wt % copper, up to 1 wt % magnesium, balance alumium, said heat treated alloy being formed by the process comprising:subjecting said alloy while in molten condition to a primary pressure die casting at a casting pressure of from about 450 to about 500 kg/cm.sup.2 to form a primary pressure die cast product;removing the primary casting pressure from said primary pressure die cast product;prior to the time said aluminum silicon alloy completely solidifies, subjecting said primary pressure die cast alloy to a secondary pressure die casting so as to reduce the volume thereof from about 1.5 to about 3%;heating the thus treated product to a temperature of from about 460.degree. C. to about 520.degree. C. for a period of time of from about 2 to about 10 hours; andrapidly quenching said product to produce said article.
    Type: Grant
    Filed: February 27, 1990
    Date of Patent: October 15, 1991
    Assignee: Taiho Kogyo Co., Ltd.
    Inventors: Kenichiro Futamura, Keiichiro Otsu
  • Patent number: 5057200
    Abstract: A high-coercivity thin-film magnetic recording medium, and method of producing the medium, is disclosed. The medium has a sputtered chromium underlayer, preferably about 300-1,000 .ANG. thick, and a sputtered magnetic layer, preferably about 200-800 .ANG. thick, composed of an alloy containing between 70-80% cobalt, 10-20% chromium, 3-20% platinum, and 2-10% tantalum, formed on the chromium underlayer. The medium is characterized by high coercivity, resolution, amplitude and loop squareness value, and low bit shift.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: October 15, 1991
    Assignee: HMT Technology Corporation
    Inventors: Brij B. Lal, Atef H. Eltoukhy
  • Patent number: 5055254
    Abstract: Magnesium alloys having improved corrosion resistance, one alloy containing not more than 0.0024% iron, 0.010% nickel and 0.0024% copper and not less than 0.15% manganese and the other containing not more than 0.0015% iron, 0.0010% nickel and 0.0010% copper and not less than 0.15% manganese.
    Type: Grant
    Filed: October 5, 1989
    Date of Patent: October 8, 1991
    Assignee: Timminco Limited
    Inventor: Douglas J. Zuliani
  • Patent number: 5053085
    Abstract: The present invention provides high strength, heat resistant aluminum-based alloys having a composition represented by the general formula, Al.sub.a M.sub.b X.sub.cwherein:M is at least one metal element selected from the group consisting of V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Ti, Mo, W, Ca, Li, Mg, and Si;X is at least one metal element selected from the group consisting of Y, La, Ce, Sm, Nd, Hf, Nb, Ta and Mm (misch metal); anda, b and c are atomic percentages falling within the following ranges:50.ltoreq.a.ltoreq.95, 0.5.ltoreq.b.ltoreq.35 and 0.5.ltoreq.c.ltoreq.25,the aluminum-based alloy being in an amorphous state, microcrystalline state or a composite state thereof. The aluminum-based alloys possess an advantageous combination of properties of high strength, heat resistance, superior ductility and good processability which make them suitable for various applications.
    Type: Grant
    Filed: April 28, 1989
    Date of Patent: October 1, 1991
    Assignees: Yoshida Kogyo K.K., Piston Ring Company, Ltd., Tsuyoshi Masumoto
    Inventors: Tsuyoshi Masumoto, Akihisa Inoe, Katsumasa Odera, Masahiro Oguchi
  • Patent number: 5053084
    Abstract: The present invention provides high-strength, heat resistant aluminum alloys having a composition represented by the general formula:Al.sub.a M.sub.b X.sub.d or Al.sub.a M.sub.b Q.sub.c X.sub.e(wherein M is at least one metal element selected from the group consisting of Cu, Ni, Co and Fe; Q is at least one metal element selected from the group consisting Mn, Cr, Mo, W, V, Ti and Zr; X is at least one metal element selected from the group consisting of Nb, Ta, Hf and Y; and a, b, c, d and e are atomic percentages falling within the following ranges: 45.ltoreq.a.ltoreq.90, 5.ltoreq.b.ltoreq.40, 0<c.ltoreq.12, 0.5.ltoreq.d.ltoreq.15 and 0.5.ltoreq.e.ltoreq.10, the aluminum alloy containing at least 50% by volume of amorphous phase.
    Type: Grant
    Filed: April 30, 1990
    Date of Patent: October 1, 1991
    Assignees: Yoshida Kogyo K.K., Tsuyoshi Masumoto
    Inventors: Tsuyoshi Masumoto, Akihisa Inoue, Katsumasa Odera, Masahiro Oguchi
  • Patent number: 5051316
    Abstract: A Pb-based overlay alloy of a plain bearing contains 3%-20% of In and more than 0.5% to 9% of Sb, and, preferably 0.1%-5% of Ag, Cu, Ni, and/or Mn, and exhibits improved properties at a high temperature and corrosive condition of deteriorated lubricating oil.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: September 24, 1991
    Assignee: Taiho Kogyo Co., Ltd.
    Inventor: Takashi Suzuki
  • Patent number: 5049451
    Abstract: A high-coercivity thin-film magnetic recording medium, and method of producing the medium, is disclosed. The medium has a sputtered chromium underlayer, preferably about 300-1,000 .ANG. thick, and a sputtered magnetic layer, preferably about 200-800 .ANG. thick, composed of an alloy containing between 70-80% cobalt, 10-20% chromium, 3-20% platinum, and 2-10% tantalum, formed on the chromium underlayer. The medium is characterized by high coercivity, resolution, amplitude and loop squareness value, and low bit shift.
    Type: Grant
    Filed: December 12, 1990
    Date of Patent: September 17, 1991
    Assignee: HMT Technology Corporation
    Inventors: Brij B. Lal, Atef H. Eltoukhy
  • Patent number: 5049450
    Abstract: A composite thermal spray powder for abradable coatings is formed as homogeneously agglomerated particles. Each agglomerated particle consists of pluralities of subparticles of boron nitride and subparticles of aluminum or aluminum alloy bonded with an organic binder.
    Type: Grant
    Filed: May 10, 1990
    Date of Patent: September 17, 1991
    Assignee: The Perkin-Elmer Corporation
    Inventors: Mitchell R. Dorfman, Burton A. Kushner