Patents by Inventor Hideo Yoshitaka

Hideo Yoshitaka 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 the production of a resin-laminated rubber closure for a medical vial
    Patent number: 5078941
    Abstract: A process for molding a resin-laminated rubber closure for a medical vial. This closure includes an annular leg part to be inserted into the mouth of the vial, which leg part is notched or cut at least at one position and a flange part to be contacted with the front surface of the vial mouth. The outer and inner surfaces of the annular leg part are laminated with a chemical-resistant resin film except for the upper end of the leg part so that the rubber surface is exposed at the upper end of said leg portion. The leg part has at least one protrusion on the outer surface of the laminated portion.
    Type: Grant
    Filed: July 17, 1987
    Date of Patent: January 7, 1992
    Assignees: Daikyo Gomu Sekio Ltd., Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Yutaka Tatsumi, Hideo Yoshitaka, Tatsuya Matsunaga, Denpei Sudo, Tamotsu Okuda
  • Resin-laminated rubber closure for a medical vial
    Patent number: 4915243
    Abstract: A resin-laminated rubber closure for a medical vial is provided herein. This closure comprises an annular leg part to be inserted into the mouth of the vial, which leg part is notched or cut at least at one position and a flange part to be contacted with the front surface of the vial mouth, wherein the outer and inner surfaces of the annular leg part is provided with a chemical-resistant resin film laminated thereon except for the upper end of the leg part so that the rubber surface is exposed at the upper end of said leg portion, and wherein the leg part has at least one protrusion on the outer surface of the laminated portion. The present invention also relates to a molding process for economically producing said closure.
    Type: Grant
    Filed: April 19, 1988
    Date of Patent: April 10, 1990
    Assignees: Daikyo Gomu Seiko, Ltd., Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Yutaka Tatsumi, Hideo Yoshitaka, Tatsuya Matsunaga, Denpei Sudo, Tamotsu Okuda