Patents by Inventor Nobuharu Iijima

Nobuharu Iijima 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).

  • Composition and method of making an element-modified ferrofluid
    Patent number: 7063802
    Abstract: An element-modified ferrofluid comprising a base oil, a plurality of magnetic particles covered with at least one surfactant, and an elemental modifier. The elemental modifier is a metal, a metal mixture, an alloy, or a nonmetal.
    Type: Grant
    Filed: March 28, 2003
    Date of Patent: June 20, 2006
    Assignee: Ferrotec Corporation
    Inventors: Shiro Tsuda, Koji Nemoto, Nobuharu Iijima, Nobuaki Kurihara
  • Composition and method of making an element-modified ferrofluid
    Publication number: 20040195540
    Abstract: An element-modified ferrofluid comprising a base oil, a plurality of magnetic particles covered with at least one surfactant, and an elemental modifier. The elemental modifier is a metal, a metal mixture, an alloy, or a nonmetal.
    Type: Application
    Filed: March 28, 2003
    Publication date: October 7, 2004
    Inventors: Shiro Tsuda, Koji Nemoto, Nobuharu Iijima, Nobuaki Kurihara