Patents by Inventor Yoshi Arakawa

Yoshi Arakawa 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).

  • Zinc-free continuously variable transmission fluid
    Patent number: 6337309
    Abstract: A zinc-free lubricating composition for lubricating a continuously variable transmission is disclosed, the lubricating composition comprising a mixture of a major amount of a lubricating oil and an effective amount of a performance enhancing additive combination comprising: (a) an ashless polyisobutenyl succinimide dispersant; (b) at least one organic thioether phosphite; (c) a calcium phenate overbased detergent at a concentration such that the total amount of calcium in the fluid is less than about 500 ppm; (d) friction modifiers comprising one or more succinimides and one or more ethoxylated amines; and (e) a primary amide of a long chain carboxylic acid.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: January 8, 2002
    Assignee: Infineum International LTD
    Inventors: Raymond F. Watts, Yasuhiro Murakami, Katherine M. Richard, Makoto Maeda, Yukio Ueda, Yoshi Arakawa, Takao Ishikawa