Patents by Inventor Mituaki Ishimaru

Mituaki Ishimaru 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).

  • Engine oil composition
    Patent number: 6627583
    Abstract: An engine oil composition characterized by containing a major amount of lubricating base oil and (a) 0.01 to 30% by weight of an overbasic oil-soluble metal salt prepared by use of an alkaline-earth metal borate, (b) 0.01 to 5% by weight of a molybdenum dithiocarbamate, and (c) 0.01 to 5% by weight of an antioxidant as essential components, on the basis of the total amount of the composition.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: September 30, 2003
    Assignee: Nippon Mitsubishi Oil Corporation
    Inventors: Kiyoshi Inoue, Jinichi Igarashi, Mituaki Ishimaru, Mineo Kagaya, Masakuni Hirata
  • Engine oil composition
    Publication number: 20010044387
    Abstract: An engine oil composition characterized by containing a major amount of lubricating base oil and (a) 0.01 to 30% by weight of an overbasic oil-soluble metal salt prepared by use of an alkaline-earth metal borate, (b) 0.01 to 5% by weight of a molybdenum dithiocarbamate, and (c) 0.01 to 5% by weight of an antioxidant as essential components, on the basis of the total amount of the composition.
    Type: Application
    Filed: January 30, 2001
    Publication date: November 22, 2001
    Applicant: Nippon Mitsubishi Oil Corporation
    Inventors: Kiyoshi Inoue, Jinichi Igarashi, Mituaki Ishimaru, Mineo Kagaya, Masakuni Hirata