Patents by Inventor Kohtarou Kodama

Kohtarou Kodama 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).

  • Publication number: 20050208124
    Abstract: A medicament is provided containing as an active ingredient at least one of riboflavin, a riboflavin derivative or a pharmacologically acceptable salt thereof, which has the action of suppressing IL-1?, IL-6, IL-10, INF-?, TNF-?, GM-CSF, IL-8, MCP-1 and other cytokines. Moreover, a preventative or therapeutic agent for inflammatory diseases accompanied by hypercytokinemia is provided which has excellent cytokine suppression effect.
    Type: Application
    Filed: March 11, 2003
    Publication date: September 22, 2005
    Applicant: EISAI Co., Ltd.
    Inventors: Seiichi Araki, Mamoru Suzuki, Kohtarou Kodama, Toshio Toyosawa
  • Patent number: 6699870
    Abstract: The present invention provides a phthalazine compound as a therapeutic agent for erectile dysfunction represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: wherein R1 and R2 are the same as or different from each other and represent a halogen atom, a C1 to C4 alkyl group which may be substituted with a halogen atom, a C1 to C4 alkoxy group which may be substituted with a halogen atom or a cyano group; X represents a cyano group, a nitro group, a halogen atom, a hydroxyimino group which may be substituted or a heteroaryl group which may be substituted; Y represents a heteroaryl group, an aryl group which may be substituted, an alkynyl group which may substituted, an alkenyl group, an alkyl group, an optionally substituted saturated or unsaturated 4- to 8-membered amine ring, and the cyclic amine compound is a monocyclic compound, bicyclic compound or a spiro compound; l is an integer of 1 to 3; provided that the case where l is 1 or 2, X is a
    Type: Grant
    Filed: October 28, 2002
    Date of Patent: March 2, 2004
    Assignee: Eisai Co., Ltd.
    Inventors: Nobuhisa Watanabe, Norio Karibe, Kazuki Miyazaki, Fumihiro Ozaki, Atsushi Kamada, Shuhei Miyazawa, Yoshimitsu Naoe, Toshihiko Kaneko, Itaru Tsukada, Tadashi Nagakura, Hiroki Ishihara, Kohtarou Kodama, Hideyuki Adachi
  • Publication number: 20030105074
    Abstract: The present invention provides a phthalazine compound as a therapeutic agent for erectile dysfunction represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: 1
    Type: Application
    Filed: October 28, 2002
    Publication date: June 5, 2003
    Applicant: Eisai Co., Ltd.
    Inventors: Nobuhisa Watanabe, Norio Karibe, Kazuki Miyazaki, Fumihiro Ozaki, Atsushi Kamada, Shuhei Miyazawa, Yoshimitsu Naoe, Toshihiko Kaneko, Itaru Tsukada, Tadashi Nagakura, Hiroki Ishihara, Kohtarou Kodama, Hideyuki Adachi
  • Patent number: 6498159
    Abstract: The present invention provides a phthalazine compound as a therapeutic agent for erectile dysfunction represented by the following formula, a pharmacologically acceptable salt thereof or a hydrate thereof: wherein R1 and R2 are the same as or different from each other and represent a halogen atom, a C1 to C4 alkyl group which may be substituted with a halogen atom, a C1 to C4 alkoxy group which may be substituted with a halogen atom or a cyano group; X represents a cyano group, a nitro group, a halogen atom, a hydroxyimino group which may be substituted or a heteroaryl group which may be substituted; Y represents a heteroaryl group, an aryl group which may be substituted, an alkynyl group which may substituted, an alkenyl group, an alkyl group, an optionally substituted saturated or unsaturated 4- to 8-membered amine ring, and the cyclic amine compound is a monocyclic compound, bicyclic compound or a spiro compound; l is an integer of 1 to 3; provided that the case where l is 1 or 2, X is a
    Type: Grant
    Filed: March 8, 2000
    Date of Patent: December 24, 2002
    Assignee: Eisai Co., Ltd.
    Inventors: Nobuhisa Watanabe, Norio Karibe, Kazuki Miyazaki, Fumihiro Ozaki, Atsushi Kamada, Shuhei Miyazawa, Yoshimitsu Naoe, Toshihiko Kaneko, Itaru Tsukada, Tadashi Nagakura, Hiroki Ishihara, Kohtarou Kodama, Hideyuki Adachi
  • Patent number: 6288064
    Abstract: The present invnetion provides a remedy for erectile dysfunction. The active ingredient thereof is a fused pyridazine compound represented by the following formula (I) or a pharmacologically acceptable salt thereof: (wherein the ring C represents a 5 or 6 membered ring optionally having hetero atom(s); n is an integer of from 1 to 4; R1 represents a hydrogen, a halogen, a cyano, etc.; A represents a hydrogen, a halogen, an optionally substituted amino, etc.; X represents a group represented by the formula —N═, etc.; and Y represents the formula —CO—, an optionally substituted amino, etc).
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: September 11, 2001
    Assignee: Eisai Co., Ltd.
    Inventors: Nobuhisa Watanabe, Yasuhiro Kabasawa, Shinya Abe, Mayu Shibazaki, Hiroki Ishihara, Kohtarou Kodama, Hideyuki Adachi
  • Patent number: 5606061
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: February 25, 1997
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami
  • Patent number: 5498634
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: March 12, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami
  • Patent number: 5444066
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: August 22, 1995
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami