Patents Assigned to H. C. Starck GmbH & Co. KG
  • Patent number: 5711783
    Abstract: Process for preparing high purity metal powder by reacting one or more volatile alkoxide compounds with a reducing gas.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: January 27, 1998
    Assignee: H.C. Starck, GmbH & Co., KG
    Inventor: Martin Schloh
  • Patent number: 5676817
    Abstract: Process for the production of pure tungsten and/or molybdenum solutions from sources, such as alkaline decomposition solutions, which are contaminated with tantalum, niobium, titanium, aluminium, tin, arsenic, phosphorus and/or silicon, by application of a three stage purification process of pH reduction, anion exchange and membrane electrolysis.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: October 14, 1997
    Assignee: H.C. Starck, GmbH & Co. KG
    Inventors: Wilfried Gutknecht, Wolfgang Mathy
  • Patent number: 5670271
    Abstract: The present invention relates to manganese-containing nickel(II) hydroxide powders, wherein at least 50 mole % of the manganese are present in the trivalent oxidation state, a process for the preparation of such powders and battery electrodes and batteries made therefrom.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: September 23, 1997
    Assignee: H. C. Starck GmbH & Co., KG
    Inventor: Peter Axmann
  • Patent number: 5665127
    Abstract: Microcrystalline bodies based on .alpha.-Al.sub.2 O.sub.3 are made by drying sub-micron powders, press compacting and shock sintering at an intermediate sinter temperature range of 1,300.degree. to 1,550.degree. C., i.e. bringing the compact up to such range in under 60 seconds, preferably under 10.
    Type: Grant
    Filed: January 24, 1996
    Date of Patent: September 9, 1997
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Paul Moltgen, Pirmin Wilhelm, Josef Schmoll
  • Patent number: 5599436
    Abstract: The present invention relates to a process for the preparation of manganese(III)-containing nickel(II) hydroxide powders, more than 50 mole % of the manganese being present in the trivalent oxidation state, by co-precipitation of nickel(II) and manganese salt solutions with alkali liquors.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: February 4, 1997
    Assignee: H. C. Starck GmbH & Co. KG
    Inventor: Peter Axmann
  • Patent number: 5590387
    Abstract: Metal and ceramic sintered bodies and coatings are produced using a combination of:(a) nanocrystalline metal or ceramic powder wherein less than 1% of the individual particles have a deviation of more than 40%, and no individual particles have a deviation of more than 60%, from the average grain size, and(b) at least one low molecular-weight organic compound having at least one functional group that can react and/or interact with groups present on the surface of the powder particles, the materials (a) and (b) being dispersed in water and/or a polar organic solvent as dispersion medium.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: December 31, 1996
    Assignee: H. C. Starck, GmbH & Co, KG
    Inventors: Helmut Schmidt, Rudiger Nass, Mesut Aslan, Sener Albayrak, Ertugrul Arpac, Theo Konig, Dietmar Fister
  • Patent number: 5573572
    Abstract: Process for the production of tantalum-niobium concentrates from low-tantalum, high-niobium raw materials with an Nb.sub.2 O.sub.5 /Ta.sub.2 O.sub.5 ratio of 5 to 15 in a pyrometallurgical concentration process by smelting with carbon-containing reducing agents, reductions and resmelting.
    Type: Grant
    Filed: March 28, 1995
    Date of Patent: November 12, 1996
    Assignee: H. C. Starck, GmbH & Co. KG
    Inventors: Joachim Eckert, Kurt Tolle, Jochen Weber, Klaus Rieger
  • Patent number: 5569562
    Abstract: Manganese(III)-containing nickel(II) hydroxide powders produced by coprecipitation carried out by dropping an acidified metal salt solution containing Ni.sup.+2 and Mn.sup.+3 ions into a feed of constant pH value, such that manganese(III) is incorporated into the nickel(II) hydroxide lattice, thereby preventing disproportionation into separate phases and improving performance characteristics of secondary battery electrodes manufactured therefrom.
    Type: Grant
    Filed: June 16, 1994
    Date of Patent: October 29, 1996
    Assignee: H.C. Starck, GmbH & Co. KG
    Inventors: Oskar Glemser, Peter Axmann
  • Patent number: 5525135
    Abstract: The invention relates to an abrasive material based on .alpha.-Al.sub.2 O.sub.3 and ZrO.sub.2 with a content of titanium compounds in the form of suboxides, carbides and/or oxycarbides, to a process for its production and to its use.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: June 11, 1996
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Paul Moltgen, Wolfgang Gallmann
  • Patent number: 5482530
    Abstract: The invention relates to cobalt metal powders as a binder metal for the production of diamond and/or hard-metal tools and/or wear-resistant coatings and to composite sintered articles produced therefrom.
    Type: Grant
    Filed: December 2, 1994
    Date of Patent: January 9, 1996
    Assignee: H,C. Starck GmbH & Co. KG
    Inventor: Matthias Hohne
  • Patent number: 5478510
    Abstract: A process for the production of abrasive materials by pouring molten abrasive material into the spaces between plates of an assembly of moving cooling plates. The pour is followed by solidification and removal of the poured material (and size reduction of the removed material). The plates are maintained parallel and vertical throughout the pouring, solidification and removal steps, the latter being accomplished by separation of the plates by a conversion wheel. The motion of the plates is then reversed by the wheel to reassemble the plates for a new cycle of pour, solidification and removal.
    Type: Grant
    Filed: October 18, 1993
    Date of Patent: December 26, 1995
    Assignee: H.C. Starck GmbH & Co KG
    Inventors: Paul Moltgen, Martin Lutte, Karlheinz Glaisner, Herbert Siebold
  • Patent number: 5472477
    Abstract: The present invention relates to a process for the preparation of finely divided metal and/or ceramic powders by reacting appropriate metal compounds and appropriate reagents in the gas phase (CVR) chemical vapor reaction, wherein the metal compound(s) and the further reagents are brought to reaction in the gaseous state in a reactor and are subsequently homogeneously condensed directly out of the gas phase, with exclusion of any wall reaction, and are subsequently separated from the reaction medium.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: December 5, 1995
    Assignee: H.C. Starck GmbH & Co. KG
    Inventor: Theo Konig
  • Patent number: 5435829
    Abstract: The present invention relates to a pulverulent material for the production of standardized TZM parts by sintering techniques, as well as the notion of using pulverulent nitridic or carbonitridic hard materials as alloying components in the production of the abovementioned alloy by melt-metallurgical processes (electron beam melting, arc melting).
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: July 25, 1995
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Dietmar Fister, Wolfgang Wiezoreck
  • Patent number: 5407458
    Abstract: This invention relates to fine-particle powders of the metals B, Al, Si, Ti, Zr, Hf, V, Nb, Ta and/or Cr which have a defined particle size of 1.0 nm to less than 3 .mu.m. Less than 1% of the individual particles of the powder deviate by more than 40% from the average particle size, and no individual particle of the powder deviates by more than 60% from the average particle size.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: April 18, 1995
    Assignee: H. C. Starck GmbH & Co. KG.
    Inventors: Theo Konig, Dietmar Fister
  • Patent number: 5403375
    Abstract: This invention relates to fine-particle powders of the metals Fe, Co, Ni, W and/or Mo which have a defined particle size of 1.0 nm to less than 1 00 nm. Less than 1% of the individual particles of the powder deviate by more than 40% from the average particle size, and no individual particle of the powder deviates by more than 60% from the average particle size.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: April 4, 1995
    Assignee: H.C. Starck GmbH & Co. KG
    Inventors: Theo Konig, Dietmar Fister
  • Patent number: 5391265
    Abstract: The invention relates to a process for the production of pure nickel hydroxide by anodic oxidation of metallic nickel in aqueous electrolyte solution in the presence of sulfate ions and removal of the nickel hydroxide formed and to the use of the nickel hydroxide thus produced.
    Type: Grant
    Filed: November 16, 1993
    Date of Patent: February 21, 1995
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Ulrich Krynitz, Dirk Naumann, Armin Olbrich
  • Patent number: 5356120
    Abstract: The invention relates to a gas phase reactor for producing finely divided metal and/or ceramic powder and comprising a gas preheater, a gas-introducing part, a flow-shaping part, a reaction tube and a product discharge device.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: October 18, 1994
    Assignee: H. C. Starck, GmbH and Co. KG.
    Inventors: Theo Konig, Kurt Bachle, Falk Stein, Horst Ewel, Volker Rose, Gerd Zippenfenig, Roland Klafki
  • Patent number: 5288474
    Abstract: Process for the production of phase-pure highly reactive lead metal niobates of perovskite structure corresponding to the general formula Pb.sub.3 Me(II)Nb.sub.2 O.sub.9 or Pb.sub.2 Me(III)NbO.sub.6, where Me.dbd.Mg, Fe, Co, Ni, Cr, Mn, Cd, Cu and/or Zn, in which perovskite intermediates are formed from corresponding salt solutions, separated off, dried and calcined at temperatures of 500 to 1000.degree. C.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: February 22, 1994
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Karlheinz Reichert, Harald Kroger
  • Patent number: 5256611
    Abstract: Colored corundum composite with a matrix of .alpha.-Al.sub.2 O.sub.3, as formed by sol-gel process ending in sintering and size reduction steps with addition of oxide pigments (or precursors of such oxide pigments, formable to the oxide pigment in sinter heating) added to the sol before full gelation thereof.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: October 26, 1993
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Paul Moltgen, Gerhard Winter, Fister Dietmar