Patents by Inventor Tosihiko Hizikata

Tosihiko Hizikata 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 insulators having semi-conducting glaze and conductive Portland cement containing a specified amount of carbon black
    Patent number: 4103103
    Abstract: An electrical insulator having a semi-conducting glaze, in which the region between an insulating body whose surface is coated with a semi-conducting glaze, and metal fittings, is filled with a conductive cement composition. The conductive cement composition contains 0.75-3.0 parts by weight of carbon black per each 100 parts by weight of Portland cement and has a high mechanical strength and a low volume resistivity.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: July 25, 1978
    Assignee: NGK Insulators, Ltd.
    Inventor: Tosihiko Hizikata