Patents by Inventor Masao Seiki

Masao Seiki 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).

  • Quaternary ammonium salts and use thereof as medicine
    Patent number: 5574054
    Abstract: Novel quaternary ammonium salts having utility in the medical field for treating gastrointestinal disorders.
    Type: Grant
    Filed: January 12, 1995
    Date of Patent: November 12, 1996
    Assignee: Zeria Pharmaceutical Co., Ltd.
    Inventors: Osamu Kitagawa, Katsuyuki Ishii, Seiichi Niwa, Sigeru Ueki, Masao Seiki
  • Trialkylamine derivative and ameliorant for digestive tract movement containing the same
    Patent number: 5380748
    Abstract: A trialkylamine derivative represented by the formula (1) or a pharmaceutically acceptable salt thereof: ##STR1## wherein R.sup.1 and R.sup.2 may be the same or different from each other and each represents lower alkyl;R.sup.3, R.sup.4 and R.sup.5 may be the same or different from one another and each represents hydrogen, lower alkyl, lower alkoxy, lower alkoxycarbonyl or halogen;R.sup.6 and R.sup.7 may be the same or different from each other and each represents hydrogen or lower alkyl;R.sup.8 represents hydrogen, lower alkyl, lower alkoxy or halogen;X represents oxygen, sulfur, --CH.dbd.N-- or --CH.dbd.CH--;Y represents oxygen, sulfur, methylene, N--R.sup.11 (wherein R.sup.11 represents lower alkyl), SO or SO.sub.2 ;Z represents --OCO(CH.sub.2).sub.p .about. or --OCH.sub.2 (CH.sub.2).sub.p .about. (wherein p represents a number of 0 to 4 and symbol .about.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: January 10, 1995
    Assignee: Zeria Pharmaceutical Co., Ltd.
    Inventors: Yoshiaki Muto, Hiromi Ichikawa, Kuniyoshi Ogura, Kyoji Chaki, Masao Seiki, Toshihiko Takemasa