Patents by Inventor Frank Kupper

Frank Kupper 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).

  • Process and device for increasing the degree of absorption during superficial solid phase hardening of workpieces by laser radiation
    Patent number: 5902420
    Abstract: In order to harden the surface of workpieces having complex shapes without reviously applying absorption promoting surface layers, a mixture of inert gas and oxygen are supplied to the processing zone while the workpiece is exposed to laser radiation. The degree of absorption is maximized by adjusting at least one of the mixing ratio, the volume flow rate, and the processing temperature to conform to a nominal value.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: May 11, 1999
    Assignee: Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.
    Inventors: Konrad Wissenbach, Ralf Jung, Frank Kupper, Gilbert Vitr