Patents by Inventor Tomoyuki Hase

Tomoyuki Hase 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).

  • Metal-containing azo compound and optical recording media
    Patent number: 6551682
    Abstract: There is provided a metal-containing azo compound suitably used for an recording layer of an optical medium, which is represented by at least one of the following general formulae: wherein M(II) is a bivalent metal, X1 and X2 are each a residue that forms a monocyclic or polycyclic aromatic ring, Y1 and Y2 are each a residue that forms a nitrogen-containing aromatic heterocycle, and one residue is different from the other in at least one of a combination of X1 and X2, and a combination of Y1 and Y2; and there is also provided an optical recording medium of which recording layer comprises said metal-containing azo compound.
    Type: Grant
    Filed: September 14, 2001
    Date of Patent: April 22, 2003
    Assignees: Matsushita Electric Industrial Co., Ltd., Yamada Chemical Co., Ltd.
    Inventors: Yoshihiro Tosaki, Tomiharu Hosaka, Toshiaki Kunieda, Masatoshi Taniguchi, Noriko Kobayashi, Tomoyuki Hase