Patents Examined by Michael L. Lewis
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Patent number: 4310574Abstract: A low cost coating protects metallic base system substrates from high temperatures, high gas velocity oxidation, thermal fatigue and hot corrosion. The coating is particularly useful for protecting vanes and blades in aircraft and land based gas turbine engines.A lacquer slurry comprising cellulose nitrate containing high purity silicon powder is sprayed onto the superalloy substrates. The silicon layer is then aluminized to complete the coating.The Si-Al coating is less costly to produce than advanced aluminides and protects the substrate from oxidation and thermal fatigue for a much longer period of time than the conventional aluminide coatings. While more expensive Pt-Al coatings and physical vapor deposited MCrAlY coatings may last longer or provide equal protection on certain substrates, the Si-Al coating exceeded the performance of both types of coatings on certain superalloys in high gas velocity oxidation and thermal fatigue.Type: GrantFiled: June 20, 1980Date of Patent: January 12, 1982Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space AdministrationInventors: Daniel L. Deadmore, Stanley G. Young
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Patent number: 4310363Abstract: A process for obtaining sealed electric passages through an insulating body nvolves subjecting a titanium oxide ceramic forming a portion of the insulating body to a reduction process at selected places where the passages are desired. The reduction process involves baking the titanium oxide ceramic in a reducing atmosphere. According to some embodiments of the invention, more of the ceramic portion than is necessary is first subjected to the reduction process and those surface portions that are not intended to be conductive are treated to have metallic traces removed therefrom.Type: GrantFiled: January 24, 1977Date of Patent: January 12, 1982Assignee: Societe Suisse pour l'Industrie Horlogere Management Services S.A.Inventor: Jean Engdahl
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Patent number: 4310349Abstract: Highly orientable acicular iron particles are made by reducing an acicular ferric oxide which has been coated with sodium tripolyphosphate.Type: GrantFiled: May 23, 1980Date of Patent: January 12, 1982Assignee: Ampex CorporationInventors: Hillard M. Kahan, William F. Acebo, Michael K. Stafford
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Patent number: 4309489Abstract: There are provided a low expansion alloy having a high corrosion resistance which consists essentially of 25-50% by weight of Ni, 1-25% by weight of Cu and optionally up to 20% by weight of Cr and the balance of essentially Fe with a small amount of impurities, and a corrosion resistant bimetal formed by applying together a low expansion alloy plate which consists essentially of 25-50% by weight of Ni, 1-25% by weight of Cu and optionally up to 20% by weight of Cr and the balance of essentially Fe, and a corrosion resistant alloy plate which has a linear expansion coefficient larger than that of said low expansion alloy plate by 5.times.10.sup.-6 .degree. C.Type: GrantFiled: May 14, 1980Date of Patent: January 5, 1982Assignee: Tokyo Shibaura Denki Kabushiki KaishaInventors: Kenichiro Momose, Kiyoshi Kumagai, Fumio Mori
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Patent number: 4309214Abstract: A system for producing metal powder in which a cryogenic fluid in the liquid phase is poured over a metal bath having a vapor pressure of at least 1 mm Hg, and the solid particles suspended in the fluid are separated therefrom and collected.The particles find application in the manufacture of paints, in the treatment of rubber, and in the metallurgical, chemical pharmaceutical and ceramic industries.Type: GrantFiled: August 27, 1979Date of Patent: January 5, 1982Assignee: L'Air Liquide, Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Jean Foulard, Gerard Bentz, Jean Galey
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Patent number: 4308055Abstract: An improved process for briquetting sponge iron-containing material wherein as binder there is employed dilute sulfuric acid and the sponge iron-containing material contains at least 40% by weight metallic iron.Type: GrantFiled: May 9, 1980Date of Patent: December 29, 1981Assignee: Metallgesellschaft AGInventors: Harry Serbent, Horst Steinhofel, Werner Kaas, Justus Kuhn, deceased
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Patent number: 4308153Abstract: A composite bearing material has a porous metallic layer integrally formed on the surface of a metallic backing, the pores and surfaces of the porous metallic layer being impregnated with a mixed bearing material of 0.1-15% fibrous material having good affinity for oil, 1-15% lubricating oil and the remainder synthetic resin. This composite bearing material is improved in its bearing properties such as load carrying capacity, wear resistance, non-stick properties and dimensional stability.Type: GrantFiled: September 26, 1979Date of Patent: December 29, 1981Assignee: Daido Metal Company Ltd.Inventor: Sanae Mori
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Patent number: 4306901Abstract: Steel is made from iron ore by comminuting the ore and recovering a particle fraction which has a size less than 50 microns. The iron rich particles then are reduced to form iron or magnetite and are beneficiated by magnetic separation. The magnetite particles are further reduced to form small size iron particles. The iron powders produced by these processes are then processed by powder metallurgical techniques.Type: GrantFiled: May 27, 1980Date of Patent: December 22, 1981Assignee: Massachusetts Institute of TechnologyInventors: Julian Szekely, Gregory J. Yurek
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Patent number: 4305752Abstract: In the process for preparing a magnetically stable powder comprising the steps of reducing an iron oxide precursor with a gaseous reduction agent and stabilizing the metallic powder thus produced, the improvement which comprises coating said iron oxide precursor with an antimony compound at a level of up to about 7 weight percent antimony based on the weight of the iron oxide content of the precursor and precipitating tin hydroxides or oxyhydroxides at a level of from about 0.5 to about 8.0 weight percent tin based on the weight of the iron oxide content of the precursor onto the antimony coated iron oxide precursor prior to said reduction.Type: GrantFiled: June 5, 1980Date of Patent: December 15, 1981Assignee: Pfizer Inc.Inventor: Louis J. Dizikes
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Patent number: 4305998Abstract: Method and protective coating composition for preventing or minimizing costion or melting of titanium and combustible alloys thereof. Two layers of coatings are applied, the first layer preventing diffusion of the second layer into the titanium or alloy even at elevated temperatures, and the second layer suppressing titanium combustion. The first layer contains chromium, molybdenum, niobium, tantalum, vanadium, zirconium, platinum, or rhodium or a combination thereof or alloy of any of these metals. The second layer contains copper, aluminum, gold, nickel, silver, cobalt or a combination thereof or alloy of any of these metals. By preventing diffusion of the second layer into the substrate, the first layer prevents degradation of substrate engineering or mechanical properties.Type: GrantFiled: February 4, 1980Date of Patent: December 15, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Brian A. Manty, Vernon G. Anderson
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Patent number: 4304593Abstract: Metallic glass powder is prepared by charging a solid metallic glass body with hydrogen to effect embrittlement, followed by comminution of the embrittled metallic glass body.Type: GrantFiled: November 14, 1979Date of Patent: December 8, 1981Assignee: Allied Chemical CorporationInventor: Arnulf J. Maeland
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Patent number: 4303741Abstract: A method of plating a strip of a metal having a melting point and a mechanical resistance which are higher than those of aluminum. The metal strip which is to be plated onto the aluminum strip is interposed between the roll or rolls and the aluminum strip on at least one face of an aluminum strip by continuous casting between rolls and by use of a nozzle. The strip of plating metal contacts the roll at least over the portion between the generatrix closest to the end of the nozzle and the generatrix situated in the plane of the roll axes. The clearance between the nozzle and the plating metal strip applied to the roll is less than 1 mm and the elongation of the plating metal strip is greater than 1% and less than that of the solidified aluminum. The present method is used in the production of composite aluminum-copper or aluminum-stainless steel strips.Type: GrantFiled: February 12, 1980Date of Patent: December 1, 1981Assignee: Manufacture Metallurgique de TournusInventor: Dominique Klein
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Patent number: 4302515Abstract: Brazing of metal parts employing a thin, homogeneous, ductile, filler metal foil is disclosed. The brazing foil, useful for brazing stainless steels, is less than about 0.0025 inch thick and has a composition consisting essentially of 0 to about 4 atom percent iron, 0 to about 21 atom percent chromium, 0 to about 19 atom percent boron, 0 to about 12 atom percent silicon, 0 to about 22 atom percent phosphorus and the balance nickel and incidental impurities. In addition to containing the foregoing elements within the above-noted composition ranges, the composition must be such that the total of iron, chromium and nickel ranges from about 76 to 84 atom percent and the total of boron, silicon and phosphorus ranges from about 16 to 24 atom percent. The ductile foil permits fabrication of preforms of complex shapes which do not require binders and/or fluxes necessary for brazing powders presently used to braze stainless steels and nickel base alloys.Type: GrantFiled: August 20, 1979Date of Patent: November 24, 1981Assignee: Allied CorporationInventors: Nicholas J. DeCristofaro, Peter Sexton
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Patent number: 4302243Abstract: In a process for producing tantalum concentrates from ores containing tantalum oxides, tantalic acid or its salts together with rutile type titanium dioxide in mixed crystals, the ores are treated in a sulfuric acid of a concentration not lower than 50% by weight with heating at a temperature from 200.degree. C. to the boiling point of said sulfuric acid, and then the above-treated products are treated with a reducing agent in an aqueous solution of sulfuric acid of a concentration lower than 50% by weight to dissolve the titanium component to thereby obtain tantalum concentrates as solid products.Type: GrantFiled: June 11, 1980Date of Patent: November 24, 1981Assignee: Mitsubishi Chemical Industries, Ltd.Inventors: Akio Tamaru, Minoru Kitsunai
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Patent number: 4301369Abstract: A semiconductor ion emitter for a mass spectrometer, comprises an electrode having semiconductor whiskers provided on the conductive surface of a base. A process for manufacturing such semiconductor ion emitter, includes steps of evaporating gold onto a wire having a diameter of about 60 .mu.m, preheating the coated wire, and supplying a gas containing the semiconductor for growth of the whiskers on the gold plated wire. An apparatus for such process comprises a vacuum vessel for enclosing the wire, means for controllably heating the wire and means for controllably supplying a gas containing the semiconductor into the vacuum vessel.Type: GrantFiled: February 13, 1979Date of Patent: November 17, 1981Assignee: The President of Osaka UniversityInventors: Takekiyo Matsuo, Itsuo Katakuse, Hisashi Matsuda
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Patent number: 4300947Abstract: An improved process for the preparation of oxidation and corrosion resistant cobalt, iron, or nickel-based alloy powders from a plurality of constituents in powdered form, by high energy mechanical alloying in an attritor-type mill, wherein at least one constituent is an active metal, such as aluminum, present as a substantial proportion of the total and is in elemental form.Type: GrantFiled: September 26, 1980Date of Patent: November 17, 1981Assignee: General Electric CompanyInventors: Emil M. Habesch, Jr., John R. Rairden
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Patent number: 4300959Abstract: A metal electroform suitable for hot isostatic pressing (HIP) of metal powders and the fabrication process therefor is disclosed. Ordinary nickel electroplate is permeable to gases during HIP, e.g., at 1200.degree. C. and 100 MPa. An exemplary improved container is comprised of a first electroplated layer of nickel, a second layer of copper and a third layer of nickel, wherein the container has been heated to about 1150.degree. C. and then cooled, to cause fusing of the second lower melting point layer. During fusing there is limited alloying between the layers, the first and third layers retaining the desired container shape.Type: GrantFiled: August 22, 1979Date of Patent: November 17, 1981Assignee: United Technologies CorporationInventors: Peter A. Hurwitz, Joseph F. Loersch
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Patent number: 4298661Abstract: A surface treated steel materials coated with manganese having a film of MmOOH (manganic hydroxide) formed thereon, which show excellent corrosion resistance, workability and weldability. The surface treated steel materials may be further coated with zinc as a base coating underlying the manganese coating or further coated with a coating of at least one selected from the group consisting of P, B, Si, Cu, Mn, Cr, Ni, Co, Fe, Zn, Al, Ca, Mg, Ti, Pb, Sn, inorganic carbon and their compounds and still further coated with an organic coating. The film of MmOOH (manganic hydroxide) is formed by a treatment in an aqueous solution containing Cr.sup.6+.Type: GrantFiled: June 1, 1979Date of Patent: November 3, 1981Assignee: Nippon Steel CorporationInventors: Teruo Ikeno, Satoshi Kado, Saburo Ayusawa, Hironobu Kawasaki, Takashi Watanabe
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Patent number: 4298660Abstract: This invention is concerned with the production of steel fiber by machining a thick steel plate or block for reinforced concrete, where a milling cutter having a plurality of cutting edges is positioned on the steel plate or block and is moved relatively in the horizontal direction. A surface of said plate or block is machined by the rotating cutting edges to chop steel fibers of approximate triangular in cross section. According to this method, steel fibers of high quality may be economically produced.Type: GrantFiled: December 7, 1978Date of Patent: November 3, 1981Assignee: Keinosuke AidaInventor: Takeo Nakagawa
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Patent number: RE30795Abstract: Green balls suitable for charging into a metallurgical furnace characterized by having sufficient strength to resist degradation during transport and charging into said furnace, made by agglomerating iron-bearing fume produced in steelmaking furnaces.Type: GrantFiled: August 23, 1979Date of Patent: November 17, 1981Assignee: Bethlehem Steel CorporationInventor: John W. Kreiger