Patents Assigned to H.C. STARCK
  • Patent number: 7651658
    Abstract: A process to chemically refine and consolidate tantalum, niobium and their alloys to a fabricated product of net shape or near-net shape with higher throughput, more consistency, and lower manufacturing costs compared to prior art routes or rejuvenate damaged and deteriorated refractory metal parts. Powder metal is loaded into hoppers to be fed into laser forming/melting equipment. A suitable substrate is loaded into a laser forming/melting chamber onto which the powder will be deposited and consolidated in a point-scan process. As the powder is fed onto successive points of the surface of the substrate in linear traces, the laser is used to heat and partially melt the substrate and completely melt the powder. A combined deposition and melt beam traces the substrate surface repeatedly over a selected area to build up a dense coating of controlled microstructure in multiple layers. A fully dense deposit is built up that becomes the desired shape.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: January 26, 2010
    Assignee: H.C. Starck Inc.
    Inventors: Paul R. Aimone, Prabhat Kumar, Peter R. Jepson
  • Publication number: 20100015467
    Abstract: Disclosed is a method of applying coatings to surfaces, wherein a gas flow forms a gas-powder mixture with a powder of a material selected from the group consisting of niobium, tantalum, tungsten, molybdenum, titanium, zirconium, nickel, cobalt, iron, chromium, aluminum, silver, copper, mixtures of at least two thereof or their alloys with at least two thereof or with other metals, the powder has a particle size of from 0.5 to 150 ?m, an oxygen content of less than 500 ppm oxygen and a hydrogen content of less than 500 ppm, wherein a supersonic speed is imparted to the gas flow and the jet of supersonic speed is directed onto the surface of an object. The coatings prepared are used, for example, as corrosion protection coatings.
    Type: Application
    Filed: October 12, 2007
    Publication date: January 21, 2010
    Applicant: H.C. Starck GmbH & Co., KG
    Inventors: Stefan Zimmermann, Steven A. Miller, Leonid N. Shekter
  • Publication number: 20100008846
    Abstract: A method for preparing ammonium heptamolybdate with the steps of: i) adding a molybdenum-containing organic phase to a liquid-liquid reextraction apparatus or to a desorption apparatus and adding an ammonia-containing aqueous solution to this reextraction or desorption apparatus, and ii) directly cold-crystallizing ammonium heptamolybdate by cooling the resulting reextraction or desorption solution.
    Type: Application
    Filed: January 29, 2008
    Publication date: January 14, 2010
    Applicant: H.C. Starck GbmJ
    Inventors: Viktor Stoller, Michael Erb, Juliane Meese-Marktscheffel, Benno Decker
  • Patent number: 7645494
    Abstract: The invention relates to a method that involves (a) removing graphite from at least one surface of a metal graphite composite material; (b) chemically cleaning or plasma etching the surface of the metal graphite composite material; (c) applying a metal-containing material to the surface of the chemically cleaned or plasma etched metal graphite composite material, and thereby forming an intermediate layer; (d) applying a metal coating on the intermediate layer, and thereby forming a composite material. The invention also relates to a composite material comprising (a) a metal graphite composite substrate having at least one surface that is substantially free of graphite; (b) a metal-containing intermediate layer located on a surface of the substrate; and (c) a metal coating on the intermediate layer.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: January 12, 2010
    Assignee: H.C. Starck Inc.
    Inventors: Richard Wu, James Cornie, Stephen Cornie, Hank Breit, Larry Ballard, Richard R. Malen, Prabhat Kumar, John Shields, Robert Desberg
  • Publication number: 20100003157
    Abstract: The invention relates to mixtures of metal, alloy or composite powders which have a mean particle diameter D50 of not more than 75 ?m, preferably not more than 25 ?m, and are produced in a process in which a starting powder is firstly deformed to give platelet-like particles and these are then comminuted in the presence of milling aids together with further additives and also the use of these powder mixtures and shaped articles produced therefrom.
    Type: Application
    Filed: July 9, 2007
    Publication date: January 7, 2010
    Applicant: H.C. Starck GmbH
    Inventors: Roland Scholl, Ulf Waag, Aloys Eiling
  • Publication number: 20090320648
    Abstract: The invention relates to a method of recovering molybdenum from a molybdenum bearing sulfide material. The material is contacted with a leaching solution in the presence of iron compounds and mesophilic or thermophilic iron oxidizing microorganisms and subsequently, a leaching process is performed by controlling the molar ratio of dissolved ferric iron to dissolved molybdenum. Preferably, a high amount and molar excess of dissolved iron is used. The presence of high concentrations of ferric iron in bioleach solutions allows iron-oxidizing microorganisms to grow and oxidize iron and bioleach molybdenite at dissolved Mo concentrations as high as 4.4 g/L. Organic metabolites were not required for protecting cells from Mo toxicity. Maximum dissolution rates depend on reactor configuration, with agglomerated material simulating heap leaching of almost 1% Mo/day, but up to 10.2% Mo/day in suspension/stirred reactor configurations, with rate highly dependent on temperature within the range of 25° C. to 40° C.
    Type: Application
    Filed: July 19, 2007
    Publication date: December 31, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Wolfgang Kummer, Wilfried Gutknecht, James Gregory Olson, Thomas R. Clark
  • Patent number: 7635396
    Abstract: The present invention provides a new process for separating zirconium and hafnium compounds, in particular to remove traces of zirconium compounds from hafnium compounds, using fractional crystallisation, as well as hafnium compounds obtainable in accordance with this process.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: December 22, 2009
    Assignee: H.C. Starck GmbH
    Inventors: Knud Reuter, Gerd Passing, Stephan Kirchmeyer
  • Publication number: 20090310285
    Abstract: The invention relates to a process for preparing polythiophene dispersions or for in situ deposition of polythiophenes. The dispersion is prepared by oxidative polymerizing of a thiophene or thiophene derivative, wherein an oxidizing agent is used and is at least one organic peroxidic compound excluding diacyl peroxide. The invention also relates to the use of specific organic peroxides as oxidizing agents in the oxidative polymerization of thiophenes. The invention further relates to a process to process a conductive layer and the use of the conductive layer.
    Type: Application
    Filed: September 19, 2007
    Publication date: December 17, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Knud Reuter, Stephen Kirchmeyer, Udo Merker, Peter Wilfried Loevenich, Timo Meyer-Friedrichsen
  • Publication number: 20090283723
    Abstract: Oligomeric compounds of the general formula (M), mixtures thereof and electronic components containing the same: wherein L represents a linear conjugated oligomeric chain; wherein each RA and each RB independently represents a moiety selected from the group consisting of linear or branched C2-C20-alkylene radicals, C3-C8-cycloalkylene radicals, mono- or polyunsaturated C2-C20-alkenylene radicals, C2-C20-oxyalkylene radicals, C2-C20-aralkylene radicals or C2-C20-oligo- or C2-C20-polyether radicals; wherein XA and XB each independently represents a moiety selected from optionally substituted vinyl groups, chlorine, iodine, hydroxyl, alkoxy groups having 1 to 3 carbon atoms, alkoxysilyl groups, silyl groups, chlorosilyl groups, siloxane groups, carboxyl groups, methyl or ethyl carbonate groups, aldehyde groups, methylcarbonyl groups, amino groups, amido groups, sulphone groups, sulphonic acid groups, halosulphonyl groups, sulphonate groups, phosphonic acid groups, phosphonate groups, trichloromethyl, tribrom
    Type: Application
    Filed: September 11, 2007
    Publication date: November 19, 2009
    Applicant: H.C. Starck Gmbh
    Inventors: Timo Meyer-Friedrichsen, Stephan Kirchmeyer, Andreas Elschner, Sergei Anatolievich Ponomarenko
  • Publication number: 20090285712
    Abstract: The present invention relates to a metal powder mixture that is suitable for producing sintered bodies. The powder mixture is suitable as a binder for hard metals and contains: a) at least one prealloyed powder selected from the group of iron/nickel, iron/cobalt, iron/nickel/cobalt and nickel/cobalt; b) at least one element powder selected from the group of iron, nickel and cobalt or a prealloyed powder selected from the group consisting of iron/nickel, iron/cobalt, iron/nickel/cobalt and nickel/cobalt which is different from component a). The invention also relates to a cemented hard material which uses the inventive powder mixture and a hard material powder, wherein the overall composition of the components a) and b) together contains not more than 90% by weight of cobalt and not more than 70% by weight of nickel and the iron content.
    Type: Application
    Filed: September 21, 2007
    Publication date: November 19, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Benno Gries, Leo Prakash
  • Publication number: 20090277301
    Abstract: The invention relates to mixtures of metal, alloy or composite powders which have a mean particle diameter D50 of not more than 75 ?m, preferably not more than 25 ?m, and are produced in a process in which a starting powder is firstly deformed to give platelet-like particles and these are then comminuted in the presence of milling aids together with further additives and also the use of these powder mixtures and shaped articles produced therefrom.
    Type: Application
    Filed: July 9, 2007
    Publication date: November 12, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Roland Scholl, Ulf Waag, Aloys Eiling
  • Publication number: 20090278095
    Abstract: Disclosed herein are capacitors having an anode based on niobium and a barrier layer based on niobium pentoxide, at least the barrier layer having a content of vanadium and process for their preparation and use.
    Type: Application
    Filed: October 30, 2008
    Publication date: November 12, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Karlheinz Reichert, Christoph Schnitter
  • Publication number: 20090255372
    Abstract: The invention relates to a process for recovering valuable metals from a superalloy which has the steps of digesting the superalloy in a salt melt. The salt melt contains 60-95% by weight of NaOH and 5-40% by weight of Na2SO4.
    Type: Application
    Filed: June 29, 2007
    Publication date: October 15, 2009
    Applicant: H.C. STARCK GMBH
    Inventors: Armin Olbrich, Juliane Meese-Marktscheffel, Matthias Jahn, Rüdiger Zertani, Viktor Stoller, Michael Erb, Karl-Heinz Heine, Uwe Kutzler
  • Patent number: 7585983
    Abstract: The invention relates to new 3,4-alkylenedioxythiophenes which are substituted with mesogenic groups, if desired via a bridging group, and their polymeric derivatives (poly-(3,4-alkylenedioxythiophenes)).
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: September 8, 2009
    Assignee: H.C. Starck, GmbH
    Inventors: Knud Reuter, Alexander Karbach, Helmut Ritter, Noelle Wrubbel
  • Publication number: 20090214378
    Abstract: The present invention relates to a process for the deoxidation of valve metal primary powders by means of reducing metals and/or metal hydrides, and a process for the production of tantalum powders that are suitable as anode material for electrolytic capacitors.
    Type: Application
    Filed: September 24, 2005
    Publication date: August 27, 2009
    Applicant: H.C. Starck GmbH & Co. KG
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • Publication number: 20090186230
    Abstract: Metallic materials consisting essentially of a conductive metal matrix, preferably copper, and a refractory dopant component selected from the group consisting of tantalum, chromium, rhodium, ruthenium, iridium, osmium, platinum, rhenium, niobium, hafnium and mixtures thereof, preferably in an amount of about 0.1 to 6% by weight based on the metallic material, alloys of such materials, sputtering targets containing the same, methods of making such targets, their use in forming thin films and electronic components containing such thin films.
    Type: Application
    Filed: October 23, 2008
    Publication date: July 23, 2009
    Applicant: H.C. Starck Inc.
    Inventors: Shuwei Sun, Mark Gaydos, Richard Wu, Prabhat Kumar
  • Patent number: 7541090
    Abstract: The invention relates to tungsten carbide powder consisting of powder particles, which have a core comprised of tungsten cast carbide and a covering comprised of tungsten monocarbide, to the production thereof by heating a tungsten cast carbide powder in the presence of a carbon source to a temperature ranging from 1300 to 2000° C., and to the use thereof for coating surfaces of parts subjected to wear and for producing drill bits.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: June 2, 2009
    Assignee: H.C. Starck GmbH
    Inventors: Christian Gerk, Klaus-Dieter Wernicke
  • Publication number: 20090123690
    Abstract: The invention relates to blends of metal, alloy or composite powders having a maximum mean particle diameter D50 of 75, preferably a maximum of 25 ?m, which are produced according to a process in which a base powder is first transformed into flake-like particles and these are then crushed in the presence of milling auxiliary agents, with further additives and also the use of these powder blends and moulded objects produced from them.
    Type: Application
    Filed: January 7, 2006
    Publication date: May 14, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Roland Scholl, Stefan Zimmermann
  • Patent number: 7504157
    Abstract: Abradable coatings are provided. The coatings comprise SrTiO in combination with a ceramic, such as ytrria stabilized zirconia, or SrTiO in combination with an MCrAlX, such as NiCoCrAlY. The abradable coatings are suitable for use in high temperature environments found in gas turbine engines. Also provided are metal articles coated with such coatings, and abradable assemblies.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: March 17, 2009
    Assignee: H.C. Starck GmbH
    Inventors: James B. Huddleston, Raymond Zatorski, Jean Mozolic
  • Patent number: 7485257
    Abstract: A valve metal powder by is prepared by a particular set of sequential steps that involves the use of precursor having preformed morphology. The method by which the valve metal is prepared includes a stabilization step that results in the valve metal powder having secondary and tertiary structures that each corresponds to the secondary and tertiary structures of the precursor. Also described is a method of producing solid electrolyte capacitors that include the valve metal powder of the present invention.
    Type: Grant
    Filed: September 28, 2005
    Date of Patent: February 3, 2009
    Assignee: H.C. Starck GmbH
    Inventors: Josua Löffelholz, Hady Seyeda, Rüdiger Wolf, Karlheinz Reichert, Christoph Schnitter