Other Noble Metal Containing Patents (Class 420/505)
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Patent number: 6689186Abstract: Provided are silver-containing powders and a method and apparatus for manufacturing the silver-containing particles of high quality, of a small size and narrow size distribution. An aerosol is generated from liquid feed and sent to a furnace, where liquid in droplets in the aerosol is vaporized to permit formation of the desired particles, which are then collected in a particle collector. The aerosol generation involves preparation of a high quality aerosol, with a narrow droplet size distribution, with close control over droplet size and with a high droplet loading suitable for commercial applications.Type: GrantFiled: September 22, 2000Date of Patent: February 10, 2004Assignee: Cabot CorporationInventors: Mark J. Hampden-Smith, Toivo T. Kodas, Quint H. Powell, Daniel J. Skamser, James Caruso, Clive D. Chandler
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Publication number: 20020122741Abstract: The dental alloys herein are formulated from a combination of palladium, silver and platinum and a small amount of one or more of indium, gallium, tin, germanium, zinc and manganese. The alloys may also contain one or more of gold, iridium, ruthenium, rhodium, rhenium, titanium, aluminum, silicon, hafnium, boron, and/or calcium. The alloys are particularly useful as substrate components for dental restorative materials including, but not limited to, orthodontic appliances, bridges, space maintainers, tooth replacement appliances, splints, crowns, partial crowns, dentures, posts, teeth, jackets, inlays, onlays, facing, veneers, facets, implants, abutments, cylinders, and connectors. The substrate may be defined as a main component of the dental restoration having one or more layers of material thereon, or as the complete restoration with no other material thereon.Type: ApplicationFiled: December 17, 2001Publication date: September 5, 2002Inventors: Arun Prasad, Grant P. Day
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Patent number: 6413649Abstract: The present invention is directed to brazing filler metals that can be used in the infiltration brazing of porous matrix materials without the need for a flux. The brazing filler metals contain two different Group II metals and a third metal of Group 9 and 10. A particular brazing filler metal of the invention contains silver, copper, and nickel. The invention is also directed to composite materials formed by infiltration of the brazing material into a porous matrix, and to methods for preparing the composite materials. The invention is further directed to composite articles fabricated from composite materials, including steel bearings or bushings, and to methods of preparing the composite articles.Type: GrantFiled: March 6, 1998Date of Patent: July 2, 2002Assignee: The Morgan Crucible Company plcInventors: David J. Kepniss, Toshimasa Oyama
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Publication number: 20020012604Abstract: An alloy material, a thin film and an optical recording medium to achieve various tasks such as maintenance of a high reflectivity, improved corrosion resistance, simplified production of the alloy, and realization of stability and simplicity/easiness of a sputtering process when being used as a sputtering target. An AgPd alloy including Ag as a main component and Pd in the range of 0.5 to 4.9 atomic % is used as a thin film formation use sputtering target material, with the target material a thin film, that is a reflecting film, constituting an optical recording medium is formed and the optical recording medium containing the reflecting film as a constituent is produced.Type: ApplicationFiled: May 10, 2000Publication date: January 31, 2002Inventors: Katsuhisa Aratani, Takashi Ueno
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Patent number: 6319617Abstract: A solder composition that bonds well to oxides and other surfaces to which solder bonding is conventionally difficult is provided. The solder is particularly useful for reliable bonding and packaging of optical components that often have oxide surfaces. The solder composition exhibits a microstructure containing a solder matrix in which is distributed fine, micron-scale islands of rare-earth-containing intermetallic particles. The existence of the islands makes the rare earth elements better available for bonding, and reduce the extent to which the rare earths are oxidized. Advantageously, the solder contains Au and/or Ag, in which the rare earth elements tend to have some solid solubility. Due to this solubility, the Au and/or Ag tend to provide some additional protection of the rare earths against oxidation, and thereby also provide accelerated dissolution of the rare earth into the molten solder.Type: GrantFiled: August 18, 2000Date of Patent: November 20, 2001Assignee: Agere Systems Gaurdian Corp.Inventors: Sungho Jin, Guenther Wilhelm Kammlott, Hareesh Mavoori, Ainissa G Ramirez
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Patent number: 6290501Abstract: The invention relates to silver-palladium alloys for the manufacture of dental prostheses which can be faced with dental ceramic. Because of selected contents of the alloy elements indium, tin and zinc, these cause no discolorations when combined with low-melting dental ceramic with a coefficient of thermal expansion of approx. 16.5 &mgr;m/mK.Type: GrantFiled: December 2, 1999Date of Patent: September 18, 2001Assignee: Degussa-Huls AktiengesellschaftInventors: Franz Josef Grau, Joseph Maria Van Der Zel
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Patent number: 5643857Abstract: A ceramic superconductive material (1) including a compound containing oxygen and at least two types of metal elements and having layer structure is molten in a vessel (2), at least an inner surface (3) of which is formed of a solid solution alloy having a base of gold or silver. Preferably the alloy is prepared from Au--5 to 40 wt. % Pd or Ag--5 to 40 wt. % Pd.Type: GrantFiled: May 8, 1991Date of Patent: July 1, 1997Assignee: Sumitomo Electric Industries, Ltd.Inventor: Kazuhiko Hayashi
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Patent number: 5462437Abstract: A dental alloy is provided which is compatible with a wide variety of composites and porcelain compositions. The alloy has a melting range of between about 870.degree. C. and 1230.degree. C. and a coefficient of thermal expansion of between 15.5.times.10.sup.-6 and 17.5.times.10.sup.-6 in/in/.degree. C. when heated from room temperature to 500.degree. C. The alloy contains between one and 85 percent by weight gold, between two and 65 percent by weight of a thermal expansion adjuster, between 0.25 and 34 percent by weight of a strengthener and oxide former, up to about one percent by weight grain refiner, and up to about 0.25 percent by weight deoxidizer.Type: GrantFiled: November 10, 1993Date of Patent: October 31, 1995Assignee: Jeneric/Pentron IncorporatedInventors: Arun Prasad, Martin Schulman
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Patent number: 5423680Abstract: A dental alloy is provided which is free of palladium, gallium and copper and which is compatible with a wide variety of composites and porcelain compositions. The alloy has a melting range of between about 870.degree. C. and 1230.degree. C. and a coefficient of thermal expansion of between 15.5.times.10.sup.-6 and 17.5.times.10.sup.-6 in/in/.degree. C. when heated from room temperature to 500.degree. C. The alloy contains between about 40 and 80 percent by weight gold, between 5 and 50 percent by weight of thermal expansion adjuster, between two and 15 percent by weight strengthener and oxide former, up to about 1.5 percent by weight grain refiner, and up to about 0.25 percent by weight deoxidizer.Type: GrantFiled: November 10, 1993Date of Patent: June 13, 1995Assignee: Jeneric/Pentron, IncorporatedInventor: Arun Prasad
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Patent number: 5422065Abstract: The contact material in particular for contacts in low-voltage switches consists of silver and further active components. In accordance with the invention, iron (Fe) in proportions of between 1 and 50% by weight and rhenium (Re) in proportions of between 0.01 and 5% by weight are present in combination as active components. The manufacture of the material and the fabricating of the contacts can be effected by methods of powder metallurgy with inclusion of molding or extrusion techniques, the active components being used in the form of separate powders, as fusible alloy or as mechanically alloyed powder.Type: GrantFiled: November 23, 1993Date of Patent: June 6, 1995Assignee: Siemens AktiengesellschaftInventors: Franz Hauner, Wolfgang Haufe
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Patent number: 5391223Abstract: It has been newly determined that in a reaction of an Ag/Pd metallization with Pb from a lead-based ceramics, a maximum solubility of Pb is observed of approximately 14% (atomic percent). By inclusion of an effective amount of Pb in the Ag/Pd metallization, leaching of Pb from a Pb-based ceramic is either reduced or eliminated. Thus, upon firing, the metallization exhibits an equilibration which prevents Pb from being drawn out of the underlying ceramic. Similarly, Ag/Pd metallization shows a maximum solubility of 16 atomic percent for Bi in Bi-based ceramics. Inclusion of an effective amount of Bi in the metallization prevents a Bi leaching from an underlying ceramic.Type: GrantFiled: August 20, 1993Date of Patent: February 21, 1995Assignee: The Penn State Research FoundationInventors: Joseph P. Dougherty, Sea-Fue Wang, Wayne Huebner
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Patent number: 5372779Abstract: A white gold alloy composition consisting essentially of about 35 to 50 weight percent of gold, about 35 to 63 weight percent of silver, about 0.1 to 7 weight percent of a whitening component of zinc, germanium or both, and palladium in an amount of about 9 weight percent or less. The whitening component and the palladium are present in an amount sufficient to impart a white gold appearance and a liquidus temperature of no greater than about 1950.degree. F. to the alloy, preferably between about 1700.degree. and 1900.degree. F., and more preferably less than about 1850.degree. F. Thus, the preferred amount of palladium is about 2 to 5 weight percent and the preferred amount of the whitening component is about 0.5 to 6 weight percent.Type: GrantFiled: May 12, 1993Date of Patent: December 13, 1994Assignee: Handy & HarmanInventor: Aldo M. Reti
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Patent number: 5314109Abstract: A method of joining orthodontic appliances or dental appliances by brazing with an alloy material containing at least about 50% by weight silver and at least about 20% by weight gold.Type: GrantFiled: April 26, 1993Date of Patent: May 24, 1994Assignee: Ormco CorporationInventor: Farrokh Farzin-Nia
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Patent number: 5292359Abstract: The present invention relates to a process for preparing silver-palladium powders that may be used for the production of electrode materials, contacts or the like used in the electronic industries. The process comprises the steps of forming an acid solution containing silver and palladium ions; adding the acid solution while stirring to an aqueous solution containing a hydrazine and a surfactant system; and forming reduction-separated silver-palladium fine powders having an average particle diameter less than 1.0 micron and a specific surface area lower than 6.0 m.sup.2 /g.Type: GrantFiled: July 16, 1993Date of Patent: March 8, 1994Assignee: Industrial Technology Research InstituteInventors: Jean Jeng-Shyong, Cheau Tei-Chih
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Patent number: 5171643Abstract: An electric contact material comprising 0.01 to 2.0 weight % of Li, 0.01 weight % or more to less than 0.2 weight % of at least one rare earth metal and the remainder being Ag. The electric contact material may further comprise 0.1 to 1.0 weight % of at least one element selected from a group consisting of In, Sn, Zn, Mn, Pd, Sb, Cu, Mg, Pb, Cd, Cr and Bi, however, for Zn and Mn, the amount is less than 0.5 % by weight; and/or 0.03 to 0.6 weight % of at least one element selected from a group consisting of Fe, Ni and Co. The electric contact material is excellent in arc resistance, wear resistance and lubricity in a small current region and is suitable as a material for a slide contact and a rotary slide contact.Type: GrantFiled: July 23, 1990Date of Patent: December 15, 1992Assignees: The Furukawa Electric Co., Ltd., Mabuchi Motor Kabushiki KaishaInventors: Satoshi Suzuki, Nobuyuki Shibata, Ryotomo Shirakawa, Akira Matsuda
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Patent number: 5098655Abstract: The electrical contact alloy is provided comprising Sb and either Au or Ag or both. In such alloys, Sb produces a non-catalytic effect to inhibit formation of carbon from organic gases derived from resin parts. Therefore, when electrical contacts of such alloys are assembled with resin parts into housings, poor contact due to carbon deposition is prevented to increase the useful life and reliability of the electrical contacts.Type: GrantFiled: May 26, 1989Date of Patent: March 24, 1992Assignee: Omron Tateisi Electronics Co.Inventor: Masatoshi Ohba
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Patent number: 5069190Abstract: The invention encompasses methods, compositions of matter and devices used with fuel combustion apparatus for treating fuels prior to combustion by flowing such fuels into intimate contact with one of a variety of metal alloys formed from refractory ores including platinum group metals and rare earths. At least one of the metal alloys of the invention is contained within a housing through which the fuel is caused to flow, thereby contacting the fuel with the alloy with a resulting decrease in pollutants and increased fuel utilization on combustion of the fuel. Fuels useful with the invention generally include hydrocarbon fuels such as diesel, gasolines, propane, butane, natural gas, etc., which are burned not only in internal combustion engines but also in other commonly used combustion apparatus.Type: GrantFiled: April 30, 1991Date of Patent: December 3, 1991Inventor: Charlie W. Richards
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Patent number: 5005986Abstract: This invention pertains to an improved high temperature slag resistant thermocouple sheath for protecting thermocouples used to measure the temperature of synthesis gas, reducing gas, or fuel gas produced by the partial oxidation of ash-containing liquid hydrocarbonaceous and/or solid carbonaceous fuels. The protection thermocouple sheath is made from a continuous binary alloy consisting of about 30 to 70 wt. % of palladium and the remainder silver. It may be used over a temperature range of about 1000.degree. F. to 2400.degree. F.Type: GrantFiled: June 19, 1989Date of Patent: April 9, 1991Assignee: Texaco Inc.Inventors: Mitri S. Najjar, Arnulf Muan
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Patent number: 5000779Abstract: The subject of this invention is the development of new alloys along with new processing approaches for the utilization of the alloys. A particular class of alloys comprises at least one noble metal selected from the group comprising gold, palladium, silver and copper and an amount of between about 0.20 weight percent and about 0.80 weight percent of at least one metalloid selected from the group of metalloids consisting of boron, phosphorous, silicon and lithium. Rapid solidification technology in powder fabrication and the addition of metalloids have been combined to produce a new class of palladium based alloys. The metalloid additions greatly increase the hardness, enhance the fine grain structure and aid sintering densification. Net-shape forming is a benefit derived from the characteristics of the new alloys.Type: GrantFiled: May 18, 1988Date of Patent: March 19, 1991Assignee: Leach & GarnerInventors: Randall M. German, Laura L. Bourguignon, Dwarika P. Agarwal, Shaji Faroog
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Patent number: 4775511Abstract: Sulfide tarnish inhibiting of silver base alloys selected from the group consisting of Ag-Cu, Ag-Au, and Ag-Cu-Au is achieved by adding to silver base alloys at least one element with passivating ability and with heat of sulfide formation which exceeds the heat of sulfide formation of silver and in the amount which does not exceed 1.5 weight % as substitute of silver, so as to form a thin layer of oxide of the element which is selected from the group consisting of Cr, Ta, Al, Ti and Th. The layer of oxide is thin and does not affect the properties of silver base alloys. The added element, in the event of damage to the oxide layer, forms a sulfide film of the element before formation of silver sulfide, to thereby protect silver base alloys from tarnishing.Type: GrantFiled: July 8, 1986Date of Patent: October 4, 1988Inventors: William Kono, John P. Nielsen
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Patent number: 4726858Abstract: A recording material made of an alloy capable of exhibiting different spectral reflectances at an equal temperature, depending on a heating-cooling cycle to which the alloy is subjected. The alloy can possess in solid state different crystal structures at a first temperature higher than the room temperature and at a second temperature lower than the first temperature but not lower than the room temperature. A part of the surface of the alloy exhibits, as a result of being quenched from the first temperature, a crystal structure which is different from the crystal structure at the second temperature, while the other part possesses the crystal structure at the second temperature, so that these two parts exhibit different spectral reflectances. Using this recording medium, it is possible to record, reproduce and erase information by means of, for example, laser beams.Type: GrantFiled: August 22, 1984Date of Patent: February 23, 1988Assignee: Hitachi, Ltd.Inventors: Tetsuro Minemura, Hisashi Ando, Isao Ikuta, Yoshiaki Kita
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Patent number: 4663189Abstract: Ceramic multilayer capacitors are prepared having a reduced metal content in the electrode by the use of finely-divided metal alloy flaked particles.Type: GrantFiled: March 15, 1985Date of Patent: May 5, 1987Assignee: Engelhard CorporationInventor: William Borland
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Patent number: 4623513Abstract: Titanium-silver alloys containing specified amounts of silver and titanium and controlled amounts of copper, aluminum and mixtures thereof are suitable for brazing ceramics, other non-metallic and metallic materials. These alloys also may contain controlled amounts of tin, palladium, indium and mixtures thereof.Type: GrantFiled: September 20, 1984Date of Patent: November 18, 1986Assignee: GTE Products CorporationInventor: Howard Mizuhara
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Patent number: 4459264Abstract: Reactive metal-palladium-silver are suitable for brazing ceramics, other non-metallic and metallic materials.Type: GrantFiled: March 14, 1983Date of Patent: July 10, 1984Assignee: GTE Products CorporationInventor: Howard Mizuhara
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Patent number: 4411863Abstract: A low-carat corrosion-resistant gold alloy which is not blacked in its skin surface color upon being cast is provided. The alloy is used as cast alloy for reparation of tooth crowns, as general decorative articles, or as contact alloy used in electrical apparatus. The alloy is composed essentially of gold, palladium and silver, with addition thereto of indium in place of copper contained in the conventional alloys, and necessary amounts of zinc or tin as deoxidant. Copper contents have been desired in view of improving the castability and mechanical strength of the alloy but the skin surface of the cast alloy may thereby be blacked to detract from aesthetic effects thus making it necessary to wash off the blacked oxide film by use of strong acid washing agents. The indium added in place of copper affords necessary mechanical properties to the alloy while providing aesthetically desirable silver to gray skin color and making the washing with strong acids unnecessary.Type: GrantFiled: June 24, 1982Date of Patent: October 25, 1983Inventors: Masasuke Otsuka, Hideyo Maniwa, Shinya Nishina
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Patent number: 4389370Abstract: The present invention provides substantially lower cost dental alloys which may be used in producing full crowns, inlays, onlays, 3/4 crowns, and fixed bridges. The alloys can be closely adapted to tooth structure by the use of normal intra-oral dental finishing techniques. The alloys of the present invention have melting points around 1900.degree. F. The alloy consists of Gold 10%, Palladium 22%, Tin 8%, Silver 59%, Zinc 1%.Type: GrantFiled: May 6, 1981Date of Patent: June 21, 1983Inventor: Nicholas J. Skalabrin
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Patent number: 4385892Abstract: A novel setting composition for dental purposes comprises a dental silver amalgam alloy composed mainly of silver and tin, and including one or more of copper, zinc, indium, palladium and gold; mercury in an amount sufficient to amalgamate said alloy: and selenium. The selenium may or may not be coated with a metal showing an affinity for mercury, such as silver. The amount of selenium contained is in a range of 0.005 to 5% by weight.Type: GrantFiled: March 9, 1982Date of Patent: May 31, 1983Assignees: Atsushige Sato, Ishi Miura, G-C Dental Industrial Corp.Inventors: Atsushige Sato, Ishi Miura, Yasuhiro Kumei, Osamu Okuno, Bunsaku Yoshida
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Patent number: 4380528Abstract: A silver-based alloy incorporating palladium, magnesium and aluminium in the following proportions of the components, percent by weight:______________________________________ palladium 5 to 30 magnesium 0.1 to 0.5 aluminium 0.01 to 0.5 silver the balance. ______________________________________The alloy of the above-specified composition, in contrast to the known silver-based alloys, possesses a sufficiently high plasticity (relative elongation of the alloy after the internal oxidation thereof is as high as 25%), while retaining a high level of mechanical strength, elasticity, electro-contact and corrosion-resistance properties.Type: GrantFiled: May 6, 1981Date of Patent: April 19, 1983Inventors: Jury F. Shevakin, Efim S. Shpichinetsky, Valentina P. Fedorenko, Boris N. Efremov, Maria N. Klevchenkova, Ivan A. Andrjuschenko, Iosif A. Krasnoselsky, Evgeny F. Anikeev, Evgeny A. Ivanov, Anatoly P. Khomyachkov, Naum A. Shvarts, Ljudmila V. Kozhevnikova, Roza M. Romanova, Alexandr D. Zhivotchenko