Patents by Inventor Tadashi Yamagata

Tadashi Yamagata 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).

  • Ink-jet recording sheet
    Patent number: 5279885
    Abstract: This invention relates to a recording sheet for an ink jet printer comprising fibrous base material and a back-coating layer formed on the back surface of the base material, which characterized by that the base material contains a cationic polymer size (a), and the back-coating layer comprises a pigment, a binder and two or more of sizes (b1) and (b2), said size (b1) being alkyl ketene dimer, alkenyl succinic anhydride, or wax emulsion, and said size (b2) being a cationic polymer.
    Type: Grant
    Filed: January 14, 1992
    Date of Patent: January 18, 1994
    Assignee: Jujo Paper Co., Ltd.
    Inventors: Takashi Ohmori, Tadashi Yamagata, Atsushi Ono, Yutaka Kojima