Patents by Inventor Kazufumi Ueno

Kazufumi Ueno 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).

  • Process for preparation of multilayer films
    Patent number: 5688456
    Abstract: A process for preparing a multilayer film having at least one polyamide layer include the steps of forcing out from a T-die by co-extrusion a multi-layer film having a layer containing about 50 to about 95% by weight of a crystalline polyamide and about 50 to about 5% by weight of an amorphous polyamide, and stretching the film at least in the lateral direction.
    Type: Grant
    Filed: July 16, 1996
    Date of Patent: November 18, 1997
    Assignee: Gunze Limited
    Inventors: Hiroki Kuriu, Akira Mita, Kazufumi Ueno, Yoshinori Matsumoto, Yoshihiro Wada, Masaaki Iwami
  • Multi-layer films
    Patent number: 5562996
    Abstract: The invention provides a multi-layer film having 1 to 4 polyamide layers, characterized in that at least one polyamide layer comprises about 50 to about 95% by weight of a crystalline polyamide and about 50 to about 5% by weight of an amorphous polyamide and that the multi-layer film is produced by stretching a flat film at least in the lateral direction; and a process for preparing the multi-layer film.
    Type: Grant
    Filed: March 30, 1995
    Date of Patent: October 8, 1996
    Assignee: Gunze Limited
    Inventors: Hiroki Kuriu, Akira Mita, Kazufumi Ueno, Yoshinori Matsumoto, Yoshihiro Wada, Masaaki Iwami