Patents by Inventor Tadao Tamezawa

Tadao Tamezawa 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).

  • Retortable pouch and packaging material for the retortable pouch
    Patent number: 4785937
    Abstract: A packaging material for a retortable pouch comprises a laminated base film formed by laminating together a polyester film and an inelastic polypropylene film, a laminated cover film formed by laminating together a polyester film and an aluminum foil, and an adhesive layer detachably bonding the polyester film of the laminated base film to the aluminum foil of the laminated cover film, thereby laminately bonding the laminated cover film to the laminated base film. When the retortable pouch is heated in a microwave oven, the laminated cover film having the aluminum foil is removed from the laminated base film, whereby microwaves generated by a magnetron are not intercepted, and cooked food packaged in the retortable pouch can be heated adequately.
    Type: Grant
    Filed: April 6, 1987
    Date of Patent: November 22, 1988
    Assignee: Kabushiki Kaisha Hosokawa Yoko
    Inventors: Tadao Tamezawa, Yoshiji Moteki