Patents by Inventor Katsuyuki Yokokawa

Katsuyuki Yokokawa 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).

  • Mixing syringe
    Patent number: 5891087
    Abstract: Behind a slidable end sealing member 3c, there is provided a liquid-absorbing element M which has a liquid-holding function so as to absorb and hold a liquid L flowing out from the end sealing member 3c when the end sealing member passes over a bypass portion 6. As this liquid-absorbent element M, such as a disk-like element D and a cylindrical element R, are typically impregnated with a water-holding and liquid-absorbing accelerator to enhance a leak preventing effect and with an antimicrobial active agent to enhance hygiene.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: April 6, 1999
    Assignees: Takeda Chemical Industries, Ltd., Arte Corporation
    Inventors: Seiji Ohtani, Nobuo Tanaka, Katsuyuki Yokokawa, Teruo Matsuda