Patents by Inventor Hans-Joachim Wallbaum

Hans-Joachim Wallbaum 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 of making dispersion strengthened products
    Patent number: 3969156
    Abstract: Sheet metal or strips are rolled and heated for dispersion hardening. Disks are cut (punched), stacked, and extruded. The disks in the stack may alternate with disks which have not yet been hardened. Subsequent heat treatment of the extruded product strengthens it throughout. The method is used specifically to make a dispersion-strengthened copper alloy to be used for making electrodes for resistance welding.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: July 13, 1976
    Assignee: Kabel-und Metallwerke Gutehoffnungshutte Aktiengesellschaft
    Inventor: Hans-Joachim Wallbaum
  • Method of making dispersion hardened copper products
    Patent number: 3947949
    Abstract: Disks are cut from copper or a copper alloy which can be precipitation-hardened. A copper alloy powder is prepared and dispersion-hardened. The disks are assembled in a stack and alternate with powder layers and extruded. Subsequent heat treatment of the extruded product strengthens it throughout. The method is used specifically to make a hardened copper alloy to be used for making electrodes for resistance welding.
    Type: Grant
    Filed: April 23, 1975
    Date of Patent: April 6, 1976
    Assignee: Kabel-und Metallwerke Gutehoffnungshutte AG
    Inventor: Hans-Joachim Wallbaum