Patents by Inventor Yasuhiko Yoneto

Yasuhiko Yoneto 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).

  • Amide containing friction modifier for use in power transmission fluids
    Patent number: 5484543
    Abstract: Friction modifier additives useful in power transmission compositions, particularly automatic transmission fluids, is disclosed. The additive comprises Component-1 alone formed by condensing a polyamine, such as tetraethylene pentamine, with an aliphatic mono acid, such as isostearic acid, or a mixture, and/or salt, of Component-1 and a Component-2 wherein Component-2 is an acid ester formed by reacting a heterodialkanol such as thiobisethanol and a hydrocarbyl substituted dicarboxylic acid or anhydride, such as octadecenyl succinic anhydride.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: January 16, 1996
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John E. Chandler, Antonio Gutierrez, Jack Ryer, Yasuhiko Yoneto, Ricardo A. Bloch, Raymond F. Watts, Robert D. Lundberg
  • Amide containing friction modifier for use in power transmission fluids
    Patent number: 5395539
    Abstract: Friction modifier additives useful in power transmission compositions, particularly automatic transmission fluids, is disclosed. The additive comprises Component-1 alone formed by condensing a polyamine, such as tetraethylene pentamine, with an aliphatic mono acid, such as isostearic acid, or a mixture, and/or salt, of Component-1 and a Component-2 wherein Component-2 is an acid ester formed by reacting a heterodialkanol such as thiobisethanol and a hydrocarbyl substituted dicarboxylic acid or anhydride, such as octadecenyl succinic anhydride.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: March 7, 1995
    Assignee: Exxon Chemical Patents Inc.
    Inventors: John E. Chandler, Antonio Gutierrez, Jack Ryer, Yasuhiko Yoneto, Richardo A. Bloch, Raymond F. Watts, Robert D. Lundberg
  • Synergistic blend of amine/amide and ester/alcohol friction modifying agents for improved fuel economy of an internal combustion engine
    Patent number: 5282990
    Abstract: The fuel economy of an internal combustion engine can be improved by adding to the lubricating oil used to lubricate the crankcase of said engine a synergistic blend of amine/amide and ester/alcohol friction modifying agents, for example, by reacting (a) a carboxylic acid, such as oleic acid and/or isostearic acid with an amine, such as diethylene triamine or tetraethylene pentamine, and (b) glycerine monooleate and/or glycerine monoricinoleate.
    Type: Grant
    Filed: February 19, 1993
    Date of Patent: February 1, 1994
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Yasuhiko Yoneto, Ricardo Bloch, Jack Ryer, Harold E. Bachman, Harold Shaub