Patents by Inventor Hideshi Ajimura

Hideshi Ajimura 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).

  • Process for producing a highly crystalline, fine .alpha.-alumina powder
    Patent number: 5432137
    Abstract: A novel process for producing highly crystalline, fine .alpha.-alumina is disclosed. Aluminum hydroxide is calcined in the presence of fine silica powder. The obtained alumina is in the alpha form and has a specific surface area of least 10 m.sup.2 /g.
    Type: Grant
    Filed: September 3, 1993
    Date of Patent: July 11, 1995
    Assignee: Mitsubishi Materials Corporation
    Inventors: Akira Nishihara, Tadashi Nakamura, Hideshi Ajimura, Motohiko Yoshizumi