Patents by Inventor Tsutomu Negama

Tsutomu Negama 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).

  • Percutaneously absorbable crosslinked polyvinylpyrrolidone eperisone or tolperisone preparation
    Patent number: 5252588
    Abstract: A pharmacological composition for percutaneous administration to a human patient comprises a pharmacologically effective amount of eperisone, a salt thereof, tolperisone or a salt thereof, a water-swellable crosslinked polyvinylpyrrolidone and a base carrier, and exhibits improved percutaneous absorption.
    Type: Grant
    Filed: February 2, 1993
    Date of Patent: October 12, 1993
    Assignees: Sekisui Kagaku Kogyo Kabushiki Kaisha, Sansho Co., Ltd., Eisai Co., Ltd.
    Inventors: Masato Azuma, Tsutomu Negama, Mitsuhiro Yoshida, Hiroyuki Fujimori