Patents by Inventor Kouzo Wakabayashi

Kouzo Wakabayashi 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).

  • Patent number: 4605142
    Abstract: A synthetic resin vessel composed of a sheet of a synthetic resin and having a top opening, wherein: a flange is formed integrally with and along the edge portion of the opening; a continuous ridge protuberance is formed on and along the top face of the flange; and a lid is heat-sealed through the protuberance to close the opening and is subsequently openable by a seal-opening operation, the synthetic resin vessel being characterized in that a projection extending toward the outer periphery is formed in one or both of portions of the protuberance for starting and terminating the seal-opening operation. This synthetic resin vessel has a high sealing property and a good peelability.
    Type: Grant
    Filed: July 17, 1984
    Date of Patent: August 12, 1986
    Assignees: Toyo Seikan Kaisha, Ltd., Tokan Kogyo Co., Ltd.
    Inventors: Shoji Itoh, Yukio Yanagawa, Kouzo Wakabayashi