Patents by Inventor Rüdiger Wolf

Rüdiger Wolf 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).

  • Valve metal powders
    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
  • Valve metal powders and process for producing them
    Patent number: 7066979
    Abstract: Process for producing a valve metal powder by producing a precursor of desired morphology, converting the precursor into an oxide of the valve metal, stabilizing the structure of the oxide by heat treatment and reducing the stabilized oxide while retaining the morphology. Valve metal powders obtainable in this way, in particular comprising spherical agglomerates with a mean agglomerate size of 10–80 ?m, preferably 20–40 ?m, and use of these valve metal powders to produce solid electrolyte capacitors.
    Type: Grant
    Filed: March 7, 2003
    Date of Patent: June 27, 2006
    Assignee: H. C. Starck GmbH
    Inventors: Josua Löffelholz, Hady Seyeda, Rüdiger Wolf, Karlheinz Reichert, Christoph Schnitter
  • Tantalum powder, method for producing same powder and sintered anodes obtained from it
    Patent number: 6238456
    Abstract: The present invention discloses a tantalum powder for capacitors and a method for making said tantalum powder wherein agglomerated tantalum powder is produced by means of thermal agglomeration of starting tantalum powders in the presence of hydrogen.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: May 29, 2001
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Rüdiger Wolf, Karlheinz Reichert, Heike Biermann, Josua Löffelholz, Detlef Breithaupt
  • Tantalum powder, method for producing same powder and sintered anodes obtained from it
    Patent number: 6193779
    Abstract: The invention relates a tantalum powder free of alkali and fluorine, which for a relatively small primary particle size has comparatively large secondary particles and is suitable for producing capacitors with a specific charge of between 100,000 and 180,000 &mgr;FV/g at specific residual currents of less than 2nA/&mgr;FV.
    Type: Grant
    Filed: August 19, 1999
    Date of Patent: February 27, 2001
    Assignee: H. C. Starck GmbH & Co. KG
    Inventors: Karlheinz Reichert, Rüdiger Wolf, Christine Rawohl