Patents by Inventor Rika Hamamoto

Rika Hamamoto 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).

  • Package for container of liquid medicine containing bicarbonate and pH indicator
    Patent number: 6232128
    Abstract: The invention relates to a bicarbonate-containing medical solution package. The package comprises a gas-permeable plastic container holding a bicarbonate-containing medical solution and a gas-impermeable plastic packaging member containing the gas-permeable plastic container. A carbon-dioxide atmosphere is established in the space between the container and packaging member. In addition, a pH indicating device is contained within the space between the container and packaging member. The pH indicating device is a gas-permeable plastic packet containing a bicarbonate-containing fluid (similar to the medical solution) and a pH indicator. The pH indicator undergoes a change in color in response to a change in pH of the fluid. Use of this package allows the easy monitoring of a change in pH and consequent aging of the medical solution due to prolonged storage or damage to the outer packaging member.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: May 15, 2001
    Assignee: Otsuka Pharmaceutical Factory, Inc.
    Inventors: Seiichiro Iguchi, Shino Shinomiya, Rika Hamamoto, Akiyo Abe, Masatoshi Inai, Keiichi Kawakami