Patents by Inventor Tsutomu Ishizeki

Tsutomu Ishizeki 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).

  • Multilayered container
    Patent number: 4728549
    Abstract: A multilayered container comprising a wall portion consisting of thermoplastic gas barrier resin (resin B) layers and thermoplastic resin (resin A) layers, with the terminal portion of the mouth opening being of a thermoplastic resin (resin A), said wall portion being a multilayered structure formed by alternately laminating the resin A layers and the resin B layers in such a manner that there are at least two resin B layers, with the proviso that there is one more of the resin A layer than the number of the resin B layers, said structure having been biaxially oriented.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: March 1, 1988
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Senzo Shimizu, Mitsuyasu Nagano, Tsutomu Ishizeki, Yoshiaki Momose