Patents by Inventor Edwin D. Gibson
Edwin D. Gibson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5714117Abstract: Method and apparatus for making a Cu-Cr melt involves melting Cu-bearing alloy component in a melting vessel disposed in ambient air atmosphere, retaining Cr-bearing alloy component in an inverted ceramic crucible held submerged in the melted Cu-bearing alloy component, introducing inert gas into the melted Cu-bearing alloy component, and flowing the melted Cu-bearing alloy component in the melting vessel through openings in the submerged crucible to contact the Cr-bearing alloy component.Type: GrantFiled: January 31, 1996Date of Patent: February 3, 1998Assignee: Iowa State University Research Foundation, Inc.Inventors: Paul M. Berge, Edwin D. Gibson, Seong-Tcho Kim, John D. Verhoeven
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Patent number: 5252147Abstract: The surface properties of copper-refractory metal (CU-RF) alloy bodies are modified by heat treatments which cause the refractory metal to form a coating on the exterior surfaces of the alloy body. The alloys have a copper matrix with particles or dendrites of the refractory metal dispersed therein, which may be niobium, vanadium, tantalum, chromium, molybdenum, or tungsten. The surface properties of the bodies are changed from those of copper to that of the refractory metal.Type: GrantFiled: February 11, 1991Date of Patent: October 12, 1993Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, Edwin D. Gibson
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Patent number: 5062025Abstract: An electrode element for an electrolytic capacitor comprises an electrode body having a plurality of ultra-fine, ribbon-shaped filaments of Al and X (where X is selected from Nb and Ta) interspersed and aligned along an axis of the body. The Al filaments are preferentially removed from a portion of the electrode body to provide a large surface area electrode surface comprising exposed end surfaces of the Al filaments and exposed lengths of the X filaments protruding beyond the exposed end surfaces of the Al filaments. Dielectric oxide films are formed on the exposed surfaces of the Al filaments and on the exposed lengths of the X filaments by an anodizing operation. A solid or liquid electrolyte is infiltrated into interfilament interstices between the exposed lengths of the X filaments and a cathode electrode is placed in electrically conductive relation to the electrolyte to form an electrolytic capacitor.Type: GrantFiled: May 25, 1990Date of Patent: October 29, 1991Assignee: Iowa State University Research FoundationInventors: John D. Verhoeven, Edwin D. Gibson
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High strength-high conductivity Cu--Fe composites produced by powder compaction/mechanical reduction
Patent number: 5043025Abstract: A particulate mixture of Cu and Fe is compacted and mechanically reduced to form an "in-situ" Cu-Fe composite having high strength and high conductivity. Compaction and mechanical reduction of the particulate mixture are carried out at a temperature and time at temperature selected to avoid dissolution of Fe into the Cu matrix particulates to a harmful extent that substantially degrades the conductivity of the Cu-Fe composite.Type: GrantFiled: June 12, 1990Date of Patent: August 27, 1991Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, William A. Spitzig, Edwin D. Gibson, Iver E. Anderson -
Patent number: 4832738Abstract: Molybdenum-copper and tungsten-copper alloys are prepared by a consumable electrode method in which the electrode consists of a copper matrix with embedded strips of refractory molybdenum or tungsten. The electrode is progressively melted at its lower end with a superatmospheric inert gas pressure maintained around the liquifying electrode. The inert gas pressure is sufficiently above the vapor pressure of copper at the liquidus temperature of the alloy being formed to suppress boiling of liquid copper.Type: GrantFiled: September 8, 1987Date of Patent: May 23, 1989Assignee: Iowa State University Research Foundation, Inc.Inventors: Frederick A. Schmidt, John D. Verhoeven, Edwin D. Gibson
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Patent number: 4818304Abstract: This invention comprises a method of increasing the magnetostrictive response of rare earth-iron (RFe) magnetostrictive alloy rods by a thermal-magnetic treatment. The rod is heated to a temperature above its Curie temperature, viz. from 400.degree. to 600.degree. C.; and, while the rod is at that temperature, a magnetic field is directionally applied and maintained while the rod is cooled, at least below its Curie temperature.Type: GrantFiled: October 20, 1987Date of Patent: April 4, 1989Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, O. Dale McMasters, Edwin D. Gibson, Jerome E. Ostenson, Douglas K. Finnemore
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Patent number: 4770718Abstract: Copper-dendritic composite alloys are prepared for mechanical reduction to increase tensile strength by dispersing molten droplets of the composite alloy into an inert gas; solidifying the droplets in the form of minute spheres or platelets; and compacting a mass of the spheres or platelets into an integrated body. The spheres preferably have diameters of from 50 to 2000 .mu.m, and the platelets thicknesses of 100 to 2000 .mu.m. The resulting spheres or platelets will contain ultra-fine dendrites which produce higher strengths on mechanical reduction of the bodies formed therefrom, or comparable strengths at lower reduction values. The method is applicable to alloys of copper with vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron and cobalt.Type: GrantFiled: October 23, 1987Date of Patent: September 13, 1988Assignee: Iowa State University Research Foundation, Inc.Inventors: John D. Verhoeven, Edwin D. Gibson, Frederick A. Schmidt, William A. Spitzig
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Patent number: 4770704Abstract: The invention comprises a continuous casting and crystallization method for manufacturing grain-oriented magnetostrictive bodies. A magnetostrictive alloy is melted in a crucible having a bottom outlet. The melt is discharged through the bottom of the crucible and deposited in an elongated mold. Heat is removed from the deposited melt through the lower end portion of the mold to progressively solidify the melt. The solid-liquid interface of the melt moves directionally upwardly from the bottom to the top of the mold, to produce the axial grain orientation.Type: GrantFiled: March 13, 1987Date of Patent: September 13, 1988Assignee: Iowa State University Research Foundation, Inc.Inventors: Edwin D. Gibson, John D. Verhoeven, Frederick A. Schmidt, O. Dale McMasters
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Patent number: 4600448Abstract: A tantalum-copper alloy can be made by preparing a consumable electrode consisting of an elongated copper billet containing at least two spaced apart tantalum rods extending longitudinally the length of the billet. The electrode is placed in a dc arc furnace and melted under conditions which co-melt the copper and tantalum to form the alloy.Type: GrantFiled: July 31, 1984Date of Patent: July 15, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Frederick A. Schmidt, John D. Verhoeven, Edwin D. Gibson
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Patent number: 4532703Abstract: An improved method of preparing composite multifilament superconducting wire of Nb.sub.3 Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb.sub.3 Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.Type: GrantFiled: April 24, 1981Date of Patent: August 6, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: John D. Verhoeven, Edwin D. Gibson, Douglas K. Finnemore, Jerome E. Ostenson, Frederick A. Schmidt, Charles V. Owen
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Patent number: 4481030Abstract: A tantalum-copper alloy can be made by preparing a consumable electrode consisting of an elongated copper billet containing at least two spaced apart tantalum rods extending longitudinally the length of the billet. The electrode is placed in a dc arc furnace and melted under conditions which co-melt the copper and tantalum to form the alloy.Type: GrantFiled: June 1, 1983Date of Patent: November 6, 1984Assignee: The United States of America as represented by the United States Department of EnergyInventors: Frederick A. Schmidt, John D. Verhoeven, Edwin D. Gibson
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Patent number: 4378330Abstract: An alloy for the commercial production of ductile superconducting wire is prepared by melting together copper and at least 15 weight percent niobium under non-oxygen-contaminating conditions, and rapidly cooling the melt to form a ductile composite consisting of discrete, randomly distributed and orientated dendritic-shaped particles of niobium in a copper matrix. As the wire is worked, the dendritric particles are realigned parallel to the longitudinal axis and when drawn form a plurality of very fine ductile superconductors in a ductile copper matrix. The drawn wire may be tin coated and wound into magnets or the like before diffusing the tin into the wire to react with the niobium. Impurities such as aluminum or gallium may be added to improve upper critical field characteristics.Type: GrantFiled: March 12, 1979Date of Patent: March 29, 1983Assignee: The United States of America as represented by the Department of EnergyInventors: John D. Verhoeven, Douglas K. Finnemore, Edwin D. Gibson, Jerome E. Ostenson
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Patent number: 4030963Abstract: A method for preparing single crystals of lanthanum hexaboride (LaB.sub.6) by arc melting a rod of compacted LaB.sub.6 powder. The method is especially suitable for preparing single crystal LaB.sub.6 cathodes for use in scanning electron microscopes (SEM) and scanning transmission electron microscopes (STEM).Type: GrantFiled: January 27, 1976Date of Patent: June 21, 1977Assignee: The United States of America as represented by the United States Energy Research and Development AdministrationInventors: Edwin D. Gibson, John D. Verhoeven