Patents by Inventor Tokahiro Seki

Tokahiro Seki 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).

  • Nylon capsule responding to pH
    Patent number: 4548955
    Abstract: The present invention relates to a nylon capsule to whose pore portion is applied a bimolecular membrane so that the capsule can respond to pH.The nylon capsule accommodates various matters such that they can be released into the outside depending on the change of pH. The nylon capsule is useful, for example, for the missile treatment of anticancer drugs, and as a gradually-releasing microcapsule.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: October 22, 1985
    Assignee: Sogo Pharmaceutical Company Limited
    Inventors: Yoshio Okahata, Tokahiro Seki