Patents by Inventor Mitsuo Tojo

Mitsuo Tojo 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).

  • Laminate film and magnetic recording medium using the same
    Patent number: 5965233
    Abstract: A laminate film comprises a base film and a second film layer containing core-shell particles and a hydrophilic resin. The laminate film is useful for a base film for a magnetic recording medium.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: October 12, 1999
    Assignee: Teijin Limited
    Inventors: Mitsuo Tojo, Makoto Handa, Toshifumi Osawa
  • Laminate film
    Patent number: 5935684
    Abstract: A laminate film comprises a base layer A formed of a thermoplastic resin A and a coating film layer B present on one surface of the base layer A. The coating film layer B contains a binder resin, inert fine particles and a surfactant. The surfactant consists essentially of 0.1 to 15% by weight of a surfactant X having an HLB value of 10 to 14 and 10 to 40% by weight of a surfactant Y having an HLB value of 16 to 18.5 based on the solid content of the coating film layer B to ensure that the average HLB value defined by the following equation be 15 to 18:average HLB=HLB(X).times.(P)X+HLB(Y).times.P(Y)wherein HLB(X) is an HLB value of the surfactant X, P(X) is a weight fraction of the surfactant X with respect to the total weight of the surfactants X and Y, HLB(Y) is an HLB value of the surfactant Y, and P(Y) is a weight fraction of the surfactant Y with respect to the total weight of the surfactants X and Y.The laminate film is useful as a base for a magnet recording medium.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: August 10, 1999
    Assignee: Teijin Limited
    Inventors: Makoto Handa, Toshifumi Osawa, Mitsuo Tojo