Patents by Inventor Kenichi Eto

Kenichi Eto 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).

  • Polyester film and magnetic recording medium using the same
    Patent number: 6783889
    Abstract: The present invention provides a polyester film, which is composed of a polyester resin and a polyimide resin, having superior oligomer-restraining property and dimensional stability. This polyester film also has improved surface conditions, that is, has a reduced number of projections on the surface, and hence, the polyester film shows superior electromagnetic conversion characteristics when used for magnetic recording media. In particular, this polyester film is effectively used for high-density magnetic recording media. This film is composed of a polyester resin and a thermoplastic resin other than a polyester resin, and has a number H1 of coarse projections 0.28 &mgr;m or more in height of 0 to 100/100 cm2 on at least one surface of the polyester film and a number H2 of coarse projections 0.56 &mgr;m or more in height of 0 to 10/100 cm2 on the same surface.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: August 31, 2004
    Assignee: Toray Industries, Inc.
    Inventors: Akira Kubota, Kenichi Eto, Yukari Nakamori, Tetsuya Tsunekawa
  • Polyester film and magnetic recording medium using the same
    Publication number: 20020114977
    Abstract: The present invention provides a polyester film, which is composed of a polyester resin and a polyimide resin, having superior oligomer-restraining property and dimensional stability. This polyester film also has improved surface conditions, that is, has a reduced number of projections on the surface, and hence, the polyester film shows superior electromagnetic conversion characteristics when used for magnetic recording media. In particular, this polyester film is effectively used for high-density magnetic recording media. This film is composed of a polyester resin and a thermoplastic resin other than a polyester resin, and has a number H1 of coarse projections 0.28 &mgr;m or more in height of 0 to 100/100 cm2 on at least one surface of the polyester film and a number H2 of coarse projections 0.56 &mgr;m or more in height of 0 to 10/100 cm2 on the same surface.
    Type: Application
    Filed: December 5, 2001
    Publication date: August 22, 2002
    Inventors: Akira Kubota, Kenichi Eto, Yukari Nakamori, Tetsuya Tsunekawa