Patents by Inventor Bernd Barthel

Bernd Barthel 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).

  • Wire electrode and process for producing a wire electrode, particular for a spark erosion process
    Patent number: 5762726
    Abstract: In order to produce a wire electrode having a core consisting of a copper/zinc alloy and to produce a specific sheath layer, the sheath layer is coated onto the core at a temperature at which no diffusion occurs. The wire electrode is subsequently heated at a heating speed higher than 10.degree. C. per second, briefly annealed at temperatures above 500.degree. C. and subsequently cooled again very rapidly at cooling speeds higher than 10.degree. C. per second.
    Type: Grant
    Filed: March 22, 1996
    Date of Patent: June 9, 1998
    Assignee: Berkenhoff GmbH
    Inventors: Bernd Barthel, Heinrich Groos, Hans Hermanni