Patents by Inventor Isao Honjo

Isao Honjo 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).

  • Lubricating oils
    Patent number: 5372703
    Abstract: Lubricant base oils are made up essentially of 2-15% by weight of a total aromatics content, greater than 60% by weight of isoparaffins and monocyclic naphthenes in total, more than 30% by weight of alkylbenzenes in the total aromatics content and smaller than 4% by weight of tricyclic and tetracyclic aromatics in the total aromatics content. The base oil has great viscosity index, small pour point, high oxidative stability and heat stability and sufficient capability to dissolve sludge.
    Type: Grant
    Filed: April 12, 1993
    Date of Patent: December 13, 1994
    Assignee: Nippon Oil Co., Ltd.
    Inventors: Kouzou Kamiya, Isao Honjo, Toshio Yoshida, Masaru Ushio, Jinichi Igarashi, Masakuni Hirata, Mitsuo Okada, Yuji Ikemoto, Kouichi Oshima, Hiroyuki Takashima