Patents by Inventor Shizumasa Yokota

Shizumasa Yokota 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).

  • Sulfonamide derivatives and drugs containing the same as the active ingredient
    Patent number: 6403607
    Abstract: The present invention discloses a sulfonamide derivative represented by the following formula (1): [wherein A represents a nitrogen atom, —CH═, etc.; Z represents an oxygen atom, etc.; Ar1 represents an aryl group, etc.; Ar2 represents an alkyl group, etc.; Ra represents a hydrogen atom, etc.; Rb represents a hydrogen atom, etc.; and Rc represents an alkyl group, etc.], or a salt thereof; and drugs containing the derivative or a salt thereof as an active ingredient. This compound exhibits radical scavenging action, gastric mucous secretion augmenting action, and anti-HP action, and thus is effective as a peptic ulcer therapeutic agent.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: June 11, 2002
    Inventors: Hiroyoshi Hidaka, Tsutomu Inoue, Isao Umezawa, Hiroyuki Nakano, Hiroshi Nakamura, Naofumi Watanabe, Shizumasa Yokota, Tomomitsu Sasaki, Yumi Yajima