Patents Examined by Margery Phipps
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Patent number: 5810983Abstract: A process for producing a high purity cobalt is provided comprising the following steps. An aqueous solution of cobalt chloride having a hydrochloric acid concentration of 7 to 12N is provided. The solution includes either or both of Fe and Ni as impurities. The solution is contacted with an anion exchange resin so that cobalt is adsorbed on the resin. Cobalt is eluted from the resin with hydrochloric acid at a concentration of 1 to 6N. The solution containing the eluted cobalt is dried or otherwise concentrated to produce a purified aqueous solution of cobalt chloride having a pH of 0 to 6. Organic materials are preferably removed from the purified solution by active carbon treatment. Electrolytic refining is conducted with the purified aqueous solution as an electrolyte to obtain electrodeposited cobalt. A high purity cobalt sputtering target can be obtained wherein Na content is 0.05 ppm or less; K content is 0.Type: GrantFiled: January 28, 1997Date of Patent: September 22, 1998Assignee: Japan Energy CorporationInventors: Yuichiro Shindo, Tsuneo Suzuki
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Patent number: 5810981Abstract: There is provided a hydrogen occluding alloy exhibiting high absorption and desorption speeds. A hydrogen occluding alloy comprising as an overall composition: 25 to 45 weight % Zr+Hf, wherein the Hf comprises not more than 4%, 1 to 15 weight % Ti, 10 to 20 weight % Mn, 2 to 12 weight % V, 0.6 to 5 weight % rare earth elements, and a balance Ni (of which content is not less than 25 weight %) and unavoidable impurities, and basically having a three-phase structure consisting of: a net-shaped continuous phase which is made of a Ni--Zr type alloy, a main phase (in the net-shaped continuous phase) made of a Zr--Ni--Mn based alloy, and a dispersed granular phase made of a rare earth elements-Ni type alloy distributed along the net-shaped continuous phase.Type: GrantFiled: March 8, 1996Date of Patent: September 22, 1998Assignee: Mitsubishi Materials CorporationInventors: Norikazu Komada, Mitsugu Matsumoto, Shinichiro Kakehashi, Yoshitaka Tamo, Chris N. Christodoulou
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Patent number: 5811058Abstract: A heat-resistant magnesium alloy containing, based on the total weight of the alloy, 4.5-10 wt. % of aluminum, 0.1-3 wt. % of calcium, 1-3 wt. % of a rare earth element and 0.2-1 wt. % of manganese and having a composition that the contents of aluminum, calcium and the rare earth element satisfy the relationship of the following expression (1):1.66+1.33 Ca+0.37 RE.ltoreq.Al.ltoreq.2.77+1.33 Ca+0.74 REwherein Ca, RE and Al represent the weight percentages of Ca, at least one rare earth element and aluminum contained in the alloy, respectively, in the relationship.Type: GrantFiled: February 25, 1997Date of Patent: September 22, 1998Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Tsuyoshi Baba, Kensuke Honma, Masao Ichikawa
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Patent number: 5788785Abstract: The present invention relates to a method for making a gamma prime precipitation strengthened nickel base alloy having an improved resistance to hydrogen embrittlement, particularly crack propagation. The alloy is cast, heat treated to dissolve substantially all the gamma-gamma prime eutectic islands and script carbides without causing incipient melting, cooled to below 1000.degree. C., HIP'ed to eliminate porosity, precipitation treated and aged. The alloy has a microstructure which is essentially free of script carbides, gamma-gamma prime eutectic islands and porosity. The microstructure further includes a plurality of regularly occurring large barrier gamma prime precipitates and a continuous field of fine cuboidal gamma prime precipitates surrounding the large barrier gamma prime precipitates.Type: GrantFiled: November 8, 1996Date of Patent: August 4, 1998Assignee: United Technology CorporationInventors: Daniel P. DeLuca, Charles M. Biondo, Howard B. Jones, Chris C. Rhemer
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Patent number: 5783318Abstract: A repaired nickel-based superalloy substrate that has applied thereon a nickel-based polycrystalline repair alloy comprising 0.03-2.5 weight % hafnium, 0.003-0.32% boron, 0.02-0.16% yttrium and 0.007-0.35% zirconium. The present invention further provides a repaired single crystal alloy substrate that has applied thereon a repair alloy wherein the repair alloy's composition is similar to or the same as the single crystal alloy composition except that the repair alloy additionally comprises at least one grain boundary strengthener element and at least one element that enhances oxidation resistance.Type: GrantFiled: June 7, 1995Date of Patent: July 21, 1998Assignee: United Technologies CorporationInventors: Charles M. Biondo, William J. Gostic, Christopher D. Parmley, John C. Tanzola
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Patent number: 5765096Abstract: A method for producing a space shuttle or nuclear reprocessing structural material of an intermetallic compound having a formula NiAl+xMoRe+cB, wherein the atomic ratio of Ni:Al is 56.5:43.5, the atomic ratio of Mo:Re is 1:1, or 1:0.5, x is between 0.1 and 1 at. %, and c is from 0 to 0.2 at. %, including the steps of:mixing Ni and Al powders in the atomic ratio of 56.5:43.5 in an inert gasadding thereto between 0.1 and 1 at. % total of Mo and Re powders in an atomic ratio of 1:1 or 1:0.5 and from 0 to 0.2 at. % of B and mixing to obtain a uniform powder mixture,packing the mixture in a steel capsule to obtain a packed mixture, and Hot Isostatically Pressing the packed mixture at a temperature from 1000.degree. to 1200.degree. C. with 200 MPA pressure to obtain a pressed material, swaging the pressed material to at least 90% theoretical reduction, and obtaining the material having a uniform and refined structure.Type: GrantFiled: May 29, 1997Date of Patent: June 9, 1998Assignee: Japan Atomic Energy Research InstituteInventor: Shintaro Ishiyama
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Patent number: 5759301Abstract: A nickel-base superalloy, in particular for the fabrication of large monocrystalline components, essentially comprises (measured in wt %): 6.0-6.8% of Cr, 8.0-10.0% of Co, 0.5-0.7% of Mo, 6.2-6.6% of W, 2.7-3.2% of Re, 5.4-5.8% of Al, 0.6-1.2% of Ti, 6.3-7.0% of Ta, 0.15-0.3% of Hf, 0.02-0.04% of C, 40-100 ppm of B. 15-50 ppm of Mg, the remainder being nickel with impurities. Carbides of Ta, Ti, and Hf, and Mg, and/or Mg--O--S compounds are concentrated along small angle grain boundaries of the superalloy.Type: GrantFiled: October 25, 1996Date of Patent: June 2, 1998Assignee: ABB Research Ltd.Inventors: Maxim Konter, Michael Newnham, Christoph Tonnes
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Patent number: 5759305Abstract: A method for forming nickel base superalloy articles of manufacture by a combination of hot die forging, isothermal forging and heat treatment below and above the solvus.Type: GrantFiled: February 7, 1996Date of Patent: June 2, 1998Assignee: General Electric CompanyInventors: Mark Gilbert Benz, Edward Lee Raymond, Robert Donald Kissinger, Eric Scott Huron, Charles Philip Blankenship, Jr., Michael Francis Henry
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Patent number: 5759300Abstract: Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere comprise 6.0 to 15.0 percent silicon, 0.1 to 2.0 percent manganese, 0.50 to 30.0 percent chromium, 0.10 to 5.0 percent molybdenum, 0.50 to 10.0 percent vanadium, 0.02 to 1.0 percent niobium, 0.10 to 5.0 percent tungsten, 0.01 to 0.5 percent nitrogen, 0.10 to 5.0 percent boron, plus 0.005 to 1.0 percent carbon, and/or either or both of 0.01 to 5.0 percent titanium and 0.01 to 5.0 percent zirconium, all by mass, with the balance comprising nickel and impurities, and have a thickness of 3.0 to 300 .mu.m. Alloy foils for liquid-phase diffusion bonding of heat-resisting metals in an oxidizing atmosphere are also available with substantially vitreous structures.Type: GrantFiled: September 27, 1996Date of Patent: June 2, 1998Assignee: Nippon Steel CorporationInventors: Yasushi Hasegawa, Hisashi Naoi, Yuuichi Satoh, Hiroshi Ukeba
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Patent number: 5753380Abstract: The present invention concerns an aluminum alloy conductor of a cryostatic stabilizer for use at ultra low temperatures of 30.degree. K. or lower which is provided on and around a superconductor. The aluminum alloy conductor is made of 6 to 200 weight ppm of at least one element selected from the group of metallic and semimetallic effective elements consisting of B, Ca, Ce, Ga, Y, Yb and Th, and aluminum and inevitable impurities. The aluminum alloy conductor is obtained by adding at least one of these elements into a high purity aluminum whose purity is at least 99.98 wt. %. The aluminum alloy conductor has a 0.2% proof strength of not greater than 2.6 Kg/mm.sup.2.Type: GrantFiled: May 16, 1995Date of Patent: May 19, 1998Assignees: Sumitomo Chemical Co., Ltd., The Texas A&M University SystemInventors: Akihiko Takahashi, Hitoshi Yasuda, Karl Theodore Hartwig, Lacy Clark McDonald
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Patent number: 5207842Abstract: The present invention relates to novel materials based on silver and tin oxide for the production of electrical contacts as well as the electrical contacts thus produced. According to the invention, these materials contain at least 6% by weight of tin oxide and from 0.02 to 5% by weight of tellurium oxide; the total content by weight of metal oxides, with the exclusion of tellurium oxide, does not exceed 15%, the balance being made up by silver. Application: manufacture of electrical equipment.Type: GrantFiled: October 23, 1990Date of Patent: May 4, 1993Assignee: Comptoir Lyon-Alemand LouyotInventors: Jean-Paul Guerlet, Dan Weber, Sophie Coupez, Claude Lambert
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Patent number: 5178842Abstract: According to the method of the invention, at least one or several of the metals nickel, cobalt and copper can be selectively precipitated as sulphide by aid of elemental sulphur from aqueous solutions containing other metals such as zinc. The temperature of the reaction is above the melting point of sulphur. The precipitation is carried out with a pH value below 2. The metals to be precipitated can be present in the solution either as oxides or sulphates. If the metals are sulphates, the sulphide of at least one of the metals is prepared to crystal seeds in the solution before precipitation.Type: GrantFiled: October 26, 1988Date of Patent: January 12, 1993Assignee: Outokumpu OyInventor: Sigmund P. Fugleberg
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Patent number: 5102452Abstract: The invention relates to a method for the treatment and production of material, particularly for the treatment and production of free flowing, finely divided metal powder or metal matrix composite powder. The material is composed of tungsten carbide and at least two components, nickel and cobalt. According to the method of the invention the composite powder is first mixed with the organic binder in order to form powder agglomerate, which powder agglomerate is further subjected to sintering treatment in order to remove the binder and to improve the mechanical strength of the composite powder. Further the composite powder is subjected to classification and the classified composite powder is thermally treated at a high temperature in an at least one-step thermal treatment in order to melt the composite powder at least partially, and in order to mix the various components to each other.Type: GrantFiled: May 14, 1990Date of Patent: April 7, 1992Assignee: Outokumpu OyInventors: Pekka A. Taskinen, Markku J. Kaskiala, Seppo T. Kemppinen, Jaana L. Niemela, Heikki J. Volotinen
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Patent number: 4969959Abstract: A method for enhancing the thermal quenching of a metal surface comprises treating the metal surface with a complex phosphate acid ester. The metal surface is simultaneously or subsequently treated with a thermal quenching fluid. The method is particularly adapted for use in thermal quenching of aluminum and aluminum alloy surfaces.Type: GrantFiled: July 31, 1989Date of Patent: November 13, 1990Assignee: Reynolds Metals CompanyInventors: Joseph M. Marr, Barry L. Riddle