Patents by Inventor Clarence R. Acker

Clarence R. Acker 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).

  • Electrical insulating system
    Patent number: 4450424
    Abstract: An insulating system is described that incorporates a cellulosic material which is impregnated with a nitrogen content no less than 0.2% by weight and a overall density not greater than 0.9 gm/cm.sup.3. This cellulosic material when impregnated by a dielectric liquid such as transformer oil, exhibits a more uniform electrical stress distribution than papers having a density greater than 0.9 gm/cm.sup.3. The insulating system thereformed is particularly useful for application in low stress areas such as the layer insulation in a distribution class transformer.
    Type: Grant
    Filed: May 10, 1982
    Date of Patent: May 22, 1984
    Assignee: McGraw-Edison Company
    Inventors: Fred S. Sadler, Paul F. Hettwer, Vu H. Viet, Clarence R. Acker