Patents by Inventor Gerrit Tempelman

Gerrit Tempelman 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).

  • Pulsed in etching of aluminum foil for use in electrolytic capacitors
    Patent number: 4484252
    Abstract: Low-voltage aluminium foil for electrolytic capacitors having an enlarged effective surface, characterized by narrow long channels which repeatedly change their directions. The overall length of the channels, which have a diameter of approximately 0.2 micron is more than 5 microns. The zones on both sides of the foil, which zones have been provided with channels, extend to substantially equal depth over the entire surface, a zone of at least 15 microns in the middle of the cross-section being of compact aluminium. This foil can be obtained by means of pulsed direct current etching.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: November 20, 1984
    Assignee: U.S. Philips Corporation
    Inventors: Rudolphus P. T. Ruijgrok, Gerrit Tempelman