Patents by Inventor Munehiro Sato

Munehiro Sato 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).

  • Electrophotographic member
    Patent number: 5403958
    Abstract: Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.
    Type: Grant
    Filed: April 30, 1993
    Date of Patent: April 4, 1995
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yoshii Morishita, Yasushi Sugimoto, Shigeru Hayashida, Hiroko Ishikawa, Yoshiaki Noda, Shigeru Murakami, Munehiro Sato, Yoshinori Saito, Naoji Kurata, Yoshio Sugita
  • Electrophotographic member
    Patent number: 5352834
    Abstract: Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.
    Type: Grant
    Filed: June 8, 1992
    Date of Patent: October 4, 1994
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshii Morishita, Yasushi Sugimoto, Shigeru Hayashida, Hiroko Ishikawa, Yoshiaki Noda, Shigeru Murakami, Munehiro Sato, Yoshinori Saito, Naoji Kurata, Yoshio Sugita
  • Electrophotographic member
    Patent number: 5160487
    Abstract: Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.
    Type: Grant
    Filed: September 4, 1991
    Date of Patent: November 3, 1992
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshii Morishita, Yasushi Sugimoto, Shigeru Hayashida, Hiroko Ishikawa, Yoshiaki Noda, Shigeru Murakami, Munehiro Sato, Yoshinori Saito, Naoji Kurata, Yoshio Sugita