Patents by Inventor Akihiko Katashima

Akihiko Katashima 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).

  • Antistatic coat, thermal transfer sheet having antistatic property and antistatic agent
    Patent number: 6825261
    Abstract: An antistatic coat of the present invention coats a surface of a base body so as to prevent accumulation of electric charges in the base body, the antistatic coat having a multi-layers structure comprising at least one antistatic layer, and the antistatic layer being disposed between the base body and an outermost surface layer of the antistatic coat. On the back surface side of a thermal transfer sheet, there is formed a heat resistant slip layer through an antistatic layer, or a heat resistant slip layer containing a conductive material. Sulfonated polyaniline, a conductive carbon black having primary particle size of up to 40 nm and specific surface of at least 130 m2/g, and a conductive carbon black having an oil absorption of at least 75 ml/100 g are favorable conductive material.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: November 30, 2004
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Akihiko Katashima, Norikatsu Ono, Masayuki Ando, Shigeki Chujo, Masayoshi Tanaka
  • Antistatic coat, thermal transfer sheet having antistatic property and antistatic agent
    Publication number: 20020032271
    Abstract: An antistatic coat of the present invention coats a surface of a base body so as to prevent accumulation of electric charges in the base body, the antistatic coat having a multi-layers structure comprising at least one antistatic layer, and the antistatic layer being disposed between the base body and an outermost surface layer of the antistatic coat. On the back surface side of a thermal transfer sheet, there is formed a heat resistant slip layer through an antistatic layer, or a heat resistant slip layer containing a conductive material. Sulfonated polyaniline, a conductive carbon black having primary particle size of up to 40 nm and specific surface of at least 130 m2/g, and a conductive carbon black having an oil absorption of at least 75 ml/100 g are favorable conductive material.
    Type: Application
    Filed: August 30, 2001
    Publication date: March 14, 2002
    Inventors: Akihiko Katashima, Norikatsu Ono, Masayuki Ando, Shigeki Chujo, Masayoshi Tanaka
  • Antistatic coat, thermal transfer sheet having antistatic property and antistatic agent
    Patent number: 6310133
    Abstract: An antistatic coat of the present invention coats a surface of a base body so as to prevent accumulation of electric charges in the base body, the antistatic coat having a multi-layers structure comprising at least one antistatic layer, and the antistatic layer being disposed between the base body and an outermost surface layer of the antistatic coat. On the back surface side of a thermal transfer sheet, there is formed a heat resistant slip layer through an antistatic layer, or a heat resistant slip layer containing a conductive material. Sulfonated polyaniline, a conductive carbon black having primary particle size of up to 40 nm and specific surface of at least 130 m2/g, and a conductive carbon black having an oil absorption of at least 75 ml/100 g are favorable conductive material.
    Type: Grant
    Filed: August 23, 1999
    Date of Patent: October 30, 2001
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Akihiko Katashima, Norikatsu Ono, Masayuki Ando, Shigeki Chujo, Masayoshi Tanaka
  • Antistatic coat, thermal transfer sheet having antistatic property and antistatic agent
    Patent number: 5968871
    Abstract: An antistatic coat of the present invention coats a surface of a base body so as to prevent accumulation of electric charges in the base body, the antistatic coat having a multi-layers structure comprising at least one antistatic layer, and the antistatic layer being disposed between the base body and an outermost surface layer of the antistatic coat. On the back surface side of a thermal transfer sheet, there is formed a heat resistant slip layer through an antistatic layer, or a heat resistant slip layer containing a conductive material. Sulfonated polyaniline, a conductive carbon black having primary particle size of up to 40 nm and specific surface of at least 130 m.sup.2 /g, and a conductive carbon black having an oil absorption of at least 75 ml/100 g are favorable conductive material.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: October 19, 1999
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Akihiko Katashima, Norikatsu Ono, Masayuki Ando, Shigeki Chujo, Masayoshi Tanaka