Patents by Inventor Rikuzo Maeda

Rikuzo Maeda 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).

  • Hydraulic fluid containing water and an .alpha.,.omega.-polybutadienedicarboxylic acid
    Patent number: 4382009
    Abstract: A hydraulic fluid comprising an oil and at least one butadine derivative selected from the group consisting of .alpha.,.omega.-polybutadienedicarboxylic acid, maleinized polybutadiene, hydrogenated .alpha.,.omega.-polybutadienedicarboxylic acid, and hydrogenated and maleinized polybutadiene.
    Type: Grant
    Filed: May 19, 1981
    Date of Patent: May 3, 1983
    Assignee: Matsumura Oil Research Corporation
    Inventor: Rikuzo Maeda