Patents by Inventor Werner Rethmann

Werner Rethmann 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).

  • Use of oxygen-free copper deoxidized by boron or lithium as material for hollow sections
    Patent number: 4814235
    Abstract: In a hollow section of oxygen-free copper deoxidized with boron or lithium, which is to be pressed over a bridge tool, the percentage of the deoxidizing agent, boron or lithium, in the finished product is 0.01% to 0.05%. The electrical conductivity of the finished section is at least 95% IACS.
    Type: Grant
    Filed: September 17, 1987
    Date of Patent: March 21, 1989
    Assignee: Kabel- und Metallwerke Gutehoffnungshutte AG
    Inventors: Meinhard Hecht, Werner Rethmann
  • Apparatus for extrusion of tubes
    Patent number: 4104903
    Abstract: An improved construction of an extrusion press for producing an extruded tube is disclosed, the press including a billet chamber and a ram adapted to drive a billet through the billet chamber, a sizing means comprising an annular die, and a mandrel for sizing the wall thickness of the tube. The improved construction including a mandrel support means attached to and concentrically extending from the front face of the mandrel for maintaining continuous coaxial alignment of the mandrel with the die, prior to and during the extrusion operation.
    Type: Grant
    Filed: March 30, 1977
    Date of Patent: August 8, 1978
    Assignee: Kabel-und Metallwerke Gutehoffnungshuette AG
    Inventors: Douglas W. Rowell, Werner Rethmann