Patents by Inventor Helmut Helldörfer

Helmut Helldörfer 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).

  • Coating method for use in a process for producing high-temperature superconductive strip conductors
    Patent number: 6572916
    Abstract: Coatings especially for superconductive strip conductors, as well as methods of applying the coatings, are addressed. Exemplary coatings include aluminum oxide in an aqueous suspension, with aluminum oxide particles contained in the suspension having size typically between 0.5-10 &mgr;m.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: June 3, 2003
    Assignee: Vacuumschmelze GmbH
    Inventors: Arnold Meyer, Jens Müller, Bernhard Fischer, Stefan Kautz, Bernhard Roas, Helmut Helldörfer
  • Process for producing a strip-shaped, multi-core superconductor with high-Tc superconducting material and superconductor produced by this process
    Patent number: 6471785
    Abstract: A process is disclosed for producing a strip-shaped superconductor with several conductor cores made of a high-Tc superconducting material and surrounded by a normal conducting material. A conductor blank (2a) produced from a fabricated conductor should be rolled flat at least once. For that purpose, the conductor blank is fed into the gap (7) between two rollers (8, 9) of which the rolling surfaces (8a, 9a) describe a concave, at least approximately elliptical contour at least in the rolling region (8a). The strip-shaped multi-core conductor produced in this way advantageously contains superconducting cores made of a bi-cuprate embedded in an Ag matrix.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: October 29, 2002
    Assignee: Vácuumschmelze GmbH
    Inventors: Bernhard Fischer, Helmut Helldoerfer, Stefan Kautz, Jens Mueller, Bernhard Roas