Patents by Inventor Franz J. Rappat

Franz J. Rappat 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 for the protection of a diaphragm during the generation of electron beam pulses
    Patent number: 5118949
    Abstract: The invention relates to a process for the protection of a diaphragm during the generation of electron-beam pulses by means of alternately deflecting the electron beam onto the diaphragm and onto a processing site.In order to prevent damage to the diaphragm from the thermal effect of the electron beam, the electron beam is distributed with respect to space and/or time over an enlarged striking surface.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: June 2, 1992
    Assignee: Messer Griesheim
    Inventors: Franz J. Rappat, Wilhelm Scheffels, Ulrich Schwab