Patents by Inventor Ulrich Bartmann

Ulrich Bartmann 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).

  • METHOD FOR THE PRODUCTION OF VALVE METAL POWDERS
    Publication number: 20180308641
    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: April 9, 2018
    Publication date: October 25, 2018
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • Method for the production of valve metal powders
    Patent number: 10032564
    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: Grant
    Filed: September 24, 2005
    Date of Patent: July 24, 2018
    Assignee: H.C. Starck Tantalum and Niobium GmbH
    Inventors: Helmut Haas, Ulrich Bartmann, Christoph Schnitter, Elisabeth Droste
  • Method for production of niobium and tantalum powder
    Patent number: 8801829
    Abstract: Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapor partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.
    Type: Grant
    Filed: October 22, 2010
    Date of Patent: August 12, 2014
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Helmut Haas, Ulrich Bartmann, Tadashi Komeya, Nobuyuki Sato
  • METHOD FOR PRODUCTION OF NIOBIUM AND TANTALUM POWDER
    Publication number: 20110067527
    Abstract: Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapour partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.
    Type: Application
    Filed: October 22, 2010
    Publication date: March 24, 2011
    Applicants: H. C. Starck GmbH, H. C. Starck Ltd.
    Inventors: Helmut HAAS, Ulrich BARTMANN, Tadashi KOMEYA, Nobuyuki SATO
  • Tantalum powder for the production of solid electrolyte capacitors
    Patent number: 7898794
    Abstract: A tantalum powder consisting of agglomerated primary particle with a minimum primary particle dimension of 0.2 to 0.8 ?m, a specific surface area of 0.9 to 2.5 m2/g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 ?m, a D50 value of 20 to 140 ?m and a D90 value of 40 to 250 ?m, wherein the powder does not comprise an effective content of sintering protection agents.
    Type: Grant
    Filed: September 24, 2005
    Date of Patent: March 1, 2011
    Assignee: H. C. Starck GmbH
    Inventors: Helmut Haas, Ulrich Bartmann
  • Method for the production of niobium and tantalum powder
    Patent number: 7824463
    Abstract: Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapor partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.
    Type: Grant
    Filed: April 9, 2005
    Date of Patent: November 2, 2010
    Assignees: H. C. Starck GmbH, H.C. Starck Ltd.
    Inventors: Helmut Haas, Ulrich Bartmann, Tadashi Komeya, Nobuyuki Sato
  • METHOD FOR THE PRODUCTION OF VALVE METAL POWDERS
    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
  • Tantalum Powder for the Production of Solid Electrolyte Capacitors
    Publication number: 20080094779
    Abstract: A tantalum powder consisting of agglomerated primary particle with a minimum primary particle dimension of 0.2 to 0.8 ?m, a specific surface area of 0.9 to 2.5 m2/g and a particle size distribution determined to ASTM B 822 corresponding to a D10 value of 5 to 25 ?m, a D50 value of 20 to 140 ?m and a D90 value of 40 to 250 ?m, wherein the powder does not comprise an effective content of sintering protection agents.
    Type: Application
    Filed: September 24, 2005
    Publication date: April 24, 2008
    Applicant: H.C. Starck GmbH & Co. KG
    Inventors: Helmut Haas, Ulrich Bartmann
  • Deoxidation of Valve Metal Powders
    Publication number: 20080011124
    Abstract: Deoxidation of valve metal powders, in particular of niobium powders, tantalum powders or their alloys, by treating the valve metal powder with calcium, barium, lanthanum, yttrium or cerium as deoxidising agent, and valve metal powders that are distinguished by a ratio of the sum of the contents of sodium, potassium and magnesium to the capacitance of less than 3 ppm/10,000 ?FV/g.
    Type: Application
    Filed: August 26, 2002
    Publication date: January 17, 2008
    Applicant: H.C. Starck GmbH & Co. KG
    Inventors: Josua Loffelholz, Ulrich Bartmann
  • Method for the Production of Niobium and Tantalum Powder
    Publication number: 20070227305
    Abstract: Process for the production of valve metal powders, in particular niobium and tantalum powder, by reduction of corresponding valve metal oxide powders by means of vaporous reducing metals and/or hydrides thereof, preferably in the presence of an inert carrier gas, wherein the reduction is performed at a vapour partial pressure of the reducing metal/metal hydride of 5 to 110 hPa and an overall pressure of less than 1000 hPa, and tantalum powder obtainable in this way having a high stability of the powder agglomerate particles.
    Type: Application
    Filed: April 9, 2005
    Publication date: October 4, 2007
    Applicants: H. C. Starck GmbH & Co. KG, H. C. Starck Ltd.
    Inventors: Helmut Haas, Ulrich Bartmann, Tadashi Komeya, Nobuyuki Sato