Patents by Inventor Masaaki Ohtsuju

Masaaki Ohtsuju 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 producing electric cable insulated with cured polyolefin
    Patent number: 4091064
    Abstract: Electric cables insulated with a cured polyolefin and having high electrical breakdown strength are produced, in each instance, by applying, an insulating layer of polyolefin containing a curing agent onto a conductor by means of an extruder, forming and hot-curing said layer by means of a long-land die, simultaneously applying a specific forming coagent to a tapered portion of the long-land die, and cooling the resulting hot-cured insulating layer formed on the conductor in a cooling zone.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: May 23, 1978
    Assignees: Dainichi Nihon Densen Kabushiki Kaisha, Mitsubishi Petrochemical Co., Ltd
    Inventors: Mitsuo Kakinuma, Isoji Motegi, Yasuo Matsui, Masatake Matsui, Masaaki Ohtsuju, Kiyoshi Takahashi, Takeo Fukuda