Patents by Inventor Christopher J. Kulis

Christopher J. Kulis 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 soldering metal oxide varistors
    Patent number: 4444351
    Abstract: A method is provided for electrically interconnecting a plurality of varistors of the type formed predominantly of metal oxide. Molten solder is first applied to the receiving surfaces provided on opposite sides of each of the varistors. The molten solder is then subjected to vibrations of from 5,000 to 35,000 hertz, causing the solder to strongly adhere to the receiving surfaces. The varistor bodies are then soldered to one another along their receiving surfaces to electrically interconnect the varistor bodies. In one embodiment of the method, the applying of molten solder, vibrating the molten solder, and soldering the varistor bodies to one another are all performed substantially simultaneously by means of a vibrating solder bath.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: April 24, 1984
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Paul P. Dries, Christopher J. Kulis, Theodore O. Sokoly