Patents by Inventor Toyokazu Owada

Toyokazu Owada 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 forming container of acrylonitrile polymers by biaxial-orientation blow-molding preform
    Patent number: 5260005
    Abstract: A process for forming a container of acrylonitrile polymers by biaxial-orientation blow-molding a preform. A preform of thermoplastic resin, mainly acrylonitrile polymers, is irradiated with an electron beam or a gamma-ray. Immediately after the irradiation, the preform is heated at 40.degree. C. or higher to reduce residual acrylonitrile monomer in the preform to 0.1 ppm or less. Then, the preform is biaxial-orientation blow molded to form a container.
    Type: Grant
    Filed: April 24, 1992
    Date of Patent: November 9, 1993
    Assignees: Japan Atomic Energy Research Institute, Yoshino Kogyosho Co., Ltd.
    Inventors: Isao Ishigaki, Keizo Makuuchi, Fumio Yoshii, Hideo Kushida, Hiroshi Iida, Toyokazu Owada