Patents by Inventor Takahiro Kitamura

Takahiro Kitamura 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).

  • Water-soluble phenylpyridazine compounds and compositions containing the same
    Publication number: 20040002497
    Abstract: Compounds having the formula (1): 1
    Type: Application
    Filed: March 26, 2003
    Publication date: January 1, 2004
    Applicant: KOWA CO., LTD.
    Inventors: Yoshinori Kyotani, Tomoyuki Koshi, Hiromichi Shigyo, Hideo Yoshizaki, Takahiro Kitamura, Shunji Takemura, Kyoko Yasuoka, Junko Totsuka, Seiichi Sato
  • Water-soluble phenylpyridazine compounds and compositions containing the same
    Publication number: 20030119838
    Abstract: Compounds having the formula (1): 1
    Type: Application
    Filed: September 25, 2002
    Publication date: June 26, 2003
    Applicant: KOWA CO., LTD.
    Inventors: Yoshinori Kyotani, Tomoyuki Koshi, Hiromichi Shigyo, Hideo Yoshizaki, Takahiro Kitamura, Shunji Takemura, Kyoko Yasuoka, Junko Totsuka, Seiichi Sato
  • Novel pyridazine derivatives and medicines containing the same as effective ingredients
    Publication number: 20020123496
    Abstract: This invention relates to pyridazine derivatives represented by the formula (1): 1
    Type: Application
    Filed: November 30, 2001
    Publication date: September 5, 2002
    Applicant: Kowa Co., Ltd.
    Inventors: Masao Ohkuchi, Yoshinori Kyotani, Hiromichi Shigyo, Tomoyuki Koshi, Takahiro Kitamura, Tadaaki Ohgiya, Takayuki Matsuda, Yukiyoshi Yamazaki, Natsuyo Kumai, Kyoko Kotaki, Hideo Yoshizaki, Yuriko Habata
  • Pyridazine derivatives and drugs containing the same as the active ingredient
    Patent number: 6403586
    Abstract: This invention relates to pyridazine derivatives represented by the formula (1): wherein R1 represents a lower alkoxyl group, a lower alkylthio group or a halogen atom; R2 represents H, a lower alkoxyl group, a lower alkylthio group or a halogen atom; R3 represents a lower alkyl or lower alkenyl group, which may be substituted by one or more OHs, CNs, lower cycloalkyl groups, (substituted) aromatic groups or (substituted) carbamoyl groups; R4 represents COOH, a lower alkoxycarbonyl group, a (substituted) carbamoyl group, a (substituted) amino group, or a (substituted) ureido group; and the dashed line indicates that the carbon-carbon bond between the 4-position and the 5-position is a single bond or a double bond, or salts thereof; and also to medicines containing them as effective ingredients.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: June 11, 2002
    Assignee: Kowa Co., Ltd.
    Inventors: Masao Ohkuchi, Yoshinori Kyotani, Hiromichi Shigyo, Hideo Yoshizaki, Tomoyuki Koshi, Takahiro Kitamura, Takayuki Matsuda, Soichi Oda, Yuriko Habata, Kyoko Kotaki
  • Pyridazine compounds and compositions containing the same
    Patent number: 6348468
    Abstract: This invention relates to pyridazine derivatives represented by the formula (1): wherein R1 represents a (substituted) aryl group, R2 represents a phenyl group substituted at 4-position by a lower alkoxyl group or a lower alkylthio group, R3 represents a lower alkoxyl group, a halogenated lower alkyl group, a lower cycloalkyl group, a (subsituted) aryl group, a (substituted) aryloxy group, a (substituted) nitrogen-containing heterocyclic ring residue, a (substituted) aminocarbonyl group or a lower alkylcarbonyl group, A represents a single bond, a lower alkylene group or a lower alkenylene group, X represents O or S, and the dashed line indicates that the carbon-carbon bond between the 4-position and the 5-position is a single bond or a double bond, or salts thereof; and also to medicines containing them as effective ingredients.
    Type: Grant
    Filed: May 15, 2000
    Date of Patent: February 19, 2002
    Assignee: Kowa Co., Ltd.
    Inventors: Masao Ohkuchi, Yoshinori Kyotani, Hiromichi Shigyo, Tomoyuki Koshi, Takahiro Kitamura, Tadaaki Ohgiya, Takayuki Matsuda, Yukiyoshi Yamazaki, Natsuyo Kumai, Kyoko Kotaki, Hideo Yoshizaki, Yuriko Habata
  • Quinoline derivatives or salt thereof and remedy for cardiac diseases containing the same
    Patent number: 5576324
    Abstract: A quinoline derivative represented by general formula (1), a medicinally acceptable salt thereof, and a remedy for cardiac diseases containing the same: ##STR1## [wherein ring A represents a furan, dihydrofuran or dioxolane ring, and R.sup.1 represents an aminoalkyl group].The compound (1) has a positively inotropic effect on myocardia and an antiarrhythmic effect, and can dilate blood vessels without extremely increasing the heart rate. Therefore, a remedy for cardiac diseases containing the same as the active ingredient is remarkably useful for treating cardiac insufficiency, arrhythmia, and so forth.
    Type: Grant
    Filed: October 27, 1994
    Date of Patent: November 19, 1996
    Assignee: Kowa Co., Ltd.
    Inventors: Yoshinori Kyotani, Tadaaki Ohgiya, Tsutomu Toma, Yuji Kurihara, Takahiro Kitamura, Takashi Yamaguchi, Kazuhiro Onogi, Seiichi Sato, Hiromichi Shigyo, Tomio Ohta, Mitsuo Kawada, Yasumi Uchida