Patents by Inventor Nobuhiro Yahata

Nobuhiro Yahata 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).

  • Azabicyclo derivatives
    Patent number: 5256656
    Abstract: Azabicyclo derivatives of formula (I) and pharmaceutically acceptable salts thereof: ##STR1## wherein A is a group of formula (a), (b) or (c): ##STR2## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.10 alkyl, aralkyl or di(C.sub.1 -C.sub.4) alkylamino(C.sub.1 -C.sub.6)alkyl;R.sub.2, R.sub.3 and R.sub.4 may be the same or different and each is hydrogen, amino, halogen, C.sub.1 -C.sub.4 alkoxy or phthalimide;X is O or NH;R is C.sub.1 -C.sub.4 alkyl; andY is NR, O or S;having 5-HT.sub.3 receptor antagonist activity.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: October 26, 1993
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Haruhiko Kikuchi, Hiroaki Satoh, Nobuhiro Yahata, Kiochiro Hagihara, Toru Hayakawa, Setsuko Mino, Makoto Yanai
  • Azabicyclo derivatives and their use as antiemetics
    Patent number: 5187166
    Abstract: Azabicyclo derivatives of formula (I) and pharmaceutically acceptable salts thereof: ##STR1## wherein A is a group of formula (a), (b) or (c): ##STR2## wherein R.sub.1 is hydrogen, C.sub.1 -C.sub.10 alkyl, aralkyl or di(C.sub.1 -C.sub.4) alkylamino(C.sub.1 -C.sub.6)alkyl;R.sub.2, R.sub.3 and R.sub.4 may be the same or different and each is hydrogen, amino, halogen, C.sub.1 -C.sub.4 alkoxy or phthalimide; X is O or NH;R is C.sub.1 -C.sub.4 alkyl; andY is NR, O or S;having 5-HT.sub.3 receptor antagonist activity.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: February 16, 1993
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Haruhiko Kikuchi, Hiroaki Satoh, Nobuhiro Yahata, Koichiro Hagihara, Toru Hayakawa, Setsuko Mino, Makoto Yanai