Patents by Inventor Tetsuji Imamoto

Tetsuji Imamoto 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).

  • Patent number: 6251861
    Abstract: A pharmaceutical composition comprising a compound having anti-endothelin activity is useful for the prophylaxis or treatment of cerebral infarction.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: June 26, 2001
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Tetsuji Imamoto, Yasutaka Nagisa
  • Patent number: 5604210
    Abstract: The present invention relates to prevention or treatment a brain edema, an intracranial hemorrhage and a cerebral infarction by administering a pharmaceutically effective amount of a compound or a pharmaceutically acceptable salt thereof, for inhibiting a vascular permeability enhancer, which the compound is of the formula: ##STR1## wherein A is halogen, --X--R.sup.3 in which X is O, S, NH or NHNH, and R.sup.3 is H, acyl, a hydrocarbon group or an aromatic heterocyclic group, or --Y.dbd.R.sup.4 in which Y is N or NHN, and R.sup.4 is a divalent hydrocarbon group, and R.sup.1 is H, halogen, a hydrocarbon group, a heterocyclic group or --Z--R.sup.5 in which Z is O, S or NH, and R.sup.5 is H, a hydrocarbon group or an aromatic heterocyclic group;R.sup.2 is H, halogen, a hydrocarbon group or a heterocyclic group;B is --W--R.sup.6 in which W is CH.sub.2, CO or CS, and R.sup.
    Type: Grant
    Filed: June 1, 1995
    Date of Patent: February 18, 1997
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Akinobu Nagaoka, Tetsuji Imamoto, Tsuneo Asano, Yoshihiro Sugiura, Giichi Goto
  • Patent number: 5527811
    Abstract: Compounds represented by the formula: ##STR1## wherein the ring A and the ring B each stand for an optionally substituted benzene ring; Ar stands for an optionally substituted aryl group or an optionally substituted heterocyclic group; Q stands for an oxygen atom or a sulfur atom; R stands for a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted hydroxyl group or an optionally substituted amino group; X stands for --O-- or --NR.sup.1 -- wherein R.sup.1 stands for a hydrogen atom or an optionally substituted hydrocarbon group; Y stands for --O--, --NR.sup.2 -- wherein R.sup.2 stands for a hydrogen atom or an optionally substituted hydrocarbon group, or a bond; m denotes 1, 2 or 3, and n denotes 0, 1 or 2, and salts thereof which have excellent calcium- or substance P receptor-antagonistic activity, being useful for treating a cerebralvascular disorder in mammals such as cerebralischemia, cerebral edema and neuronal damage, their production and use.
    Type: Grant
    Filed: July 13, 1994
    Date of Patent: June 18, 1996
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Hideaki Natsugari, Tetsuji Imamoto, Yuzo Ichimori
  • Patent number: 5441967
    Abstract: 1. A cyclic amine compound of the formula ##STR1## wherein B means a saturated or unsaturated 5- to 7-membered aza-heterocyclic group which may be substituted; A means a bond or an alkylene or alkenylene group which may be substituted by hydrocarbon residues, oxo, hydroxyimino, and/or hydroxy, .sub.-- means either a single bond or a double bond (provided that when A means a bond, .sub.-- means a single bond); R.sub.2 and R.sub.3 independently mean a hydrogen atom or a hydrocarbon residue which may be substituted (provided that both of R.sub.2 and R.sub.3 are not hydrogen atoms) or jointly form a cyclic amino group together with the adjacent nitrogen atom, n is 0, 1 or 2 and p is 1 or 2 or a physiologically acceptable salt thereof.The compounds are useful for therapy of cerebral edema, acute symptoms in cerebral apoplexy and protection of brain and nerve cell, or useful as anticholinesterase or as brain function-improving agent.
    Type: Grant
    Filed: December 22, 1993
    Date of Patent: August 15, 1995
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Giichi Goto, Hidefumi Yukimasa, Tetsuji Imamoto
  • Patent number: 5294625
    Abstract: 1. A cyclic amine compound of the formula ##STR1## wherein B means a saturated or unsaturated 5- to 7-membered aza-heterocyclic group which may be substituted; A means a bond or an alkylene or alkenylene group which may be substituted by hydrocarbon residues, oxo, hydroxyimino, and/or hydroxy, --means either a single bond or a double bond (provided that when A means a bond, --means a single bond); R.sub.2 and R.sub.3 independently mean a hydrogen atom or a hydrocarbon residue which may be substituted (provided that both of R.sub.2 and R.sub.3 are not hydrogen atoms) or jointly form a cyclic amino group together with the adjacent nitrogen atom, n is 0, 1 or 2 and p is 1 or 2 or a physiologically acceptable salt thereof.The compounds are useful for therapy of cerebral edema, acute symptoms in cerebral apoplexy and protection of brain and nerve cell, or useful as anticholinesterase or as brain function-improving agent.
    Type: Grant
    Filed: December 18, 1992
    Date of Patent: March 15, 1994
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Giichi Goto, Hidefumi Yukimasa, Tetsuji Imamoto
  • Patent number: 5177087
    Abstract: There is provided a cyclic amine compound of the formula ##STR1## wherein B means a saturated or unsaturated 5- to 7-membered aza-heterocyclic group which may be substituted; A means a bond or an alkylene or alkenylene group which may be substituted by hydrocarbon residues, oxo, hydroxyimino, and/or hydroxy, means either a single bond or a double bond (provided that when A means a bond, means a single bond); R.sub.2 and R.sub.3 independently mean a hydrogen atom or a hydrocarbon residue which may be substituted (provided that both of R.sub.2 and R.sub.3 are not hydrogen atoms) or jointly form a cyclic amino group together with the adjacent nitrogen atom, n is 0, 1 or 2 and p is 1 or 2 or a physiologically acceptable salt thereof.The compounds are useful for therapy of cerebral edema, acute symptoms in cerebral apoplexy and protection of brain and nerve cell, or useful as anticholinesterase or as brain function-improving agent.
    Type: Grant
    Filed: January 4, 1990
    Date of Patent: January 5, 1993
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Giichi Goto, Hidefumi Yukimasa, Tetsuji Imamoto