Patents by Inventor Jiro Magarifuchi

Jiro Magarifuchi 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).

  • Low phosphorous engine oil composition and additive compositions
    Patent number: 6531428
    Abstract: A low phosphorous lubricating oil composition for internal combustion engines comprising an alkylthiocarbamate compound of the formula: wherein each of R1, R2, R3, and R4 independently represents an alkyl group of 1-18 carbon atoms, and (X) represents S, S—S, S—CH2—S, S—CH2CH2—S, S—CH2CH2CH2—S, or S—CH2CH(CH3)—S, and additive compositions and additive packages utilizing the above compound.
    Type: Grant
    Filed: April 4, 1994
    Date of Patent: March 11, 2003
    Assignee: Chevron Oronite Company LLC
    Inventors: Morikuni Nakazato, Jiro Magarifuchi, Akihiro Mochizuki, Hiroshi Tanabe
  • LOW PHOSPHOROUS ENGINE OIL COMPOSITION AND ADDITIVE COMPOSITIONS
    Publication number: 20020098990
    Abstract: A low phosphorous lubricating oil composition for internal combustion engines comprising an alkylthiocarbamate compound of the formula: 1
    Type: Application
    Filed: April 4, 1994
    Publication date: July 25, 2002
    Inventors: MORIKUNI NAKAZATO, JIRO MAGARIFUCHI, AKIHIRO MOCHIZUKI, HIROSHI TANABE
  • Low phosphorous engine oil compositions and additive compositions
    Patent number: 5629272
    Abstract: An engine oil composition which comprises a metal-containing detergent, zinc dithiophosphate, and a boron-containing ashless dispersant dissolved or dispersed in a base oil; characterized by further containing an antiwear agent having an aliphatic amide compound and either a dithiocarbamate compound or an ester derived from a fatty acid and boric acid.
    Type: Grant
    Filed: December 3, 1993
    Date of Patent: May 13, 1997
    Assignee: Oronite Japan Limited
    Inventors: Morikuni Nakazato, Jiro Magarifuchi, Yoshifumi Isozaki