Patents by Inventor Kiyohiro Samizu

Kiyohiro Samizu 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: 9242973
    Abstract: The present invention provides a hydrate of N-[(4S)-2-amino-2?,2?-dimethyldispiro[1,3-oxazole-4,4?-chromene-3?,3?-oxetan]-6?-yl]-5-chloropyridine-2-carboxamide which is useful as an active ingredient of a pharmaceutical composition, in particular, a pharmaceutical composition for preventing or treating diseases or conditions associated with and/or mediated by ?-secretase activity, hydrolysis of a ?-secretase site of a ?-amyloid precursor protein, and/or ?-amyloid protein accumulation, including a pharmaceutical composition for preventing or treating diseases including, but not limited to, Glaucoma, MCI (Mild cognitive impairment) or Alzheimer's disease, especially, Alzheimer's disease.
    Type: Grant
    Filed: January 22, 2015
    Date of Patent: January 26, 2016
    Assignee: COMENTIS, INC.
    Inventors: Ryosuke Munakata, Makoto Inoue, Hiroaki Tominaga, Shingo Yamasaki, Yasuhiro Shiina, Kiyohiro Samizu, Hisao Hamaguchi, Lin Hong
  • Publication number: 20150225386
    Abstract: The present invention provides a hydrate of N-[(4S)-2-amino-2?,2?-dimethyldispiro[1,3-oxazole-4,4?-chromene-3?,3?-oxetan]-6?-yl]-5-chloropyridine-2-carboxamide which is useful as an active ingredient of a pharmaceutical composition, in particular, a pharmaceutical composition for preventing or treating diseases or conditions associated with and/or mediated by ?-secretase activity, hydrolysis of a ?-secretase site of a ?-amyloid precursor protein, and/or ?-amyloid protein accumulation, including a pharmaceutical composition for preventing or treating diseases including, but not limited to, Glaucoma, MCI (Mild cognitive impairment) or Alzheimer's disease, especially, Alzheimer's disease.
    Type: Application
    Filed: January 22, 2015
    Publication date: August 13, 2015
    Inventors: Ryosuke MUNAKATA, Makoto INOUE, Hiroaki TOMINAGA, Shingo YAMASAKI, Yasuhiro SHIINA, Kiyohiro SAMIZU, Hisao HAMAGUCHI, Lin HONG
  • Patent number: 8975415
    Abstract: The present invention provides a compound which is useful as an active ingredient of a pharmaceutical composition, in particular, a pharmaceutical composition for preventing or treating diseases or conditions associated with and/or mediated by ?-secretase activity, hydrolysis of a ?-secretase site of a ?-amyloid precursor protein, and/or ?-amyloid protein accumulation, including a pharmaceutical composition for preventing or treating diseases including, but not limited to, Glaucoma, MCI (Mild cognitive impairment) or Alzheimer's disease, especially, Alzheimer's disease.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: March 10, 2015
    Assignee: CoMentis, Inc.
    Inventors: Ryosuke Munakata, Makoto Inoue, Hiroaki Tominaga, Shingo Yamasaki, Yasuhiro Shina, Kiyohiro Samizu, Hisao Hamaguchi, Lin Hong
  • Patent number: 8822688
    Abstract: [Problem] To provide a compound useful as medicine having PDE4B inhibitory activity, in particular, as an active ingredient of a composition for treating or preventing schizophrenia, Alzheimer's disease, dementia, depression and the like. [Measures for Solution] The present inventors examined compounds having PDE4B inhibitory activity and found that a tricyclic or tetracyclic imidazo[1,2-a]pyridine derivative or salts thereof had a superior PDE4B inhibitory activity, thereby completing the present invention. The imidazo[1,2-a]pyridine derivative can be used as an agent for treating or preventing schizophrenia, Alzheimer's disease, dementia, depression and the like.
    Type: Grant
    Filed: October 26, 2012
    Date of Patent: September 2, 2014
    Assignee: Astellas Pharma Inc.
    Inventors: Kiyohiro Samizu, Naoyuki Masuda, Kazuhiko Iikubo, Yohei Koganemaru, Noriyuki Kawano, Junya Ohmori, Yasuyuki Mitani, Keni Ni
  • Publication number: 20140179695
    Abstract: The present invention provides a compound which is useful as an active ingredient of a pharmaceutical composition, in particular, a pharmaceutical composition for preventing or treating diseases or conditions associated with and/or mediated by ?-secretase activity, hydrolysis of a ?-secretase site of a ?-amyloid precursor protein, and/or ?-amyloid protein accumulation, including a pharmaceutical composition for preventing or treating diseases including, but not limited to, Glaucoma, MCI (Mild cognitive impairment) or Alzheimer's disease, especially, Alzheimer's disease.
    Type: Application
    Filed: February 27, 2014
    Publication date: June 26, 2014
    Applicants: CoMentis, Inc., ASTELLAS PHARMA INC.
    Inventors: Ryosuke MUNAKATA, Makoto INOUE, Hiroaki TOMINAGA, Shingo YAMASAKI, Yasuhiro SHIINA, Kiyohiro SAMIZU, Hisao HAMAGUCHI, Lin HONG
  • Patent number: 8207199
    Abstract: A compound which is useful as an active ingredient of a pharmaceutical composition for treating neuropathic pain is provided. The present inventors have made extensive studies on compounds having an FAAH inhibitory activity, and as a result, have found that an azole compound substituted with an N-(pyridine-3-yl)oxycarbonyl-piperidin-4-yl group and a phenyl group or a pharmaceutically acceptable salt thereof has an excellent FAAH inhibitory activity, thereby completing the present invention. The compound of the present invention is confirmed to have an excellent FAAH inhibitory activity and an antiallodynic effect in rat models with neuropathic pain, and thus is useful as an agent for preventing and/or an agent for treating neuropathic pain.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: June 26, 2012
    Assignee: Astellas Pharma Inc.
    Inventors: Satoshi Aoki, Ryosuke Munakata, Noriyuki Kawano, Kiyohiro Samizu, Hiromasa Oka, Takahiro Ishii, Takashi Sugane
  • Publication number: 20110118311
    Abstract: A compound which is useful as an active ingredient of a pharmaceutical composition for treating neuropathic pain is provided. The present inventors have made extensive studies on compounds having an FAAH inhibitory activity, and as a result, have found that an azole compound substituted with an N-(pyridine-3-yl)oxycarbonyl-piperidin-4-yl group and a phenyl group or a pharmaceutically acceptable salt thereof has an excellent FAAH inhibitory activity, thereby completing the present invention. The compound of the present invention is confirmed to have an excellent FAAH inhibitory activity and an antiallodynic effect in rat models with neuropathic pain, and thus is useful as an agent for preventing and/or an agent for treating neuropathic pain.
    Type: Application
    Filed: July 13, 2009
    Publication date: May 19, 2011
    Inventors: Satoshi Aoki, Ryosuke Munakata, Noriyuki Kawano, Kiyohiro Samizu, Hiromasa Oka, Takahiro Ishii, Takashi Sugane
  • Patent number: 7176219
    Abstract: There is provided an acid addition salt of (?)-(3R)-quinuclidin-3-yl(1R)-1-phenyl-1,2,3,4-tetrahydroisoquinoline-2-carboxylate with an acid selected from the group consisting of (?)-(2S,3S)-tartaric acid, (+)-(2S,3S)-di-O-benzoyltartaric acid, (+)-(2S,3S)-di-O-(4-methylbenzoyl)tartaric acid, (?)-L-phenylalanine, benzenesulfonic acid, cyclohexanesulfamic acid, hydrobromic acid, naphthalene-2-sulfonic acid, sebacic acid, (+)-camphor-10-sulfonic acid, p-toluenesulfonic acid, ethanesulfonic acid, methanesulfonic acid and methyl phosphate, which has little hygroscopicity that affects the use as a drug or its drug substance, and is very useful as a drug or its drug substance.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: February 13, 2007
    Assignee: Astellas Pharma Inc.
    Inventors: Masahiko Hayakawa, Kiyohiro Samizu, Hiroshi Uebayashi, Ken Ikeda, Makoto Takeuchi
  • Publication number: 20060205770
    Abstract: There is provided an acid addition salt of (?)-(3R)-quinuclidin-3-yl(1R)-1-phenyl-1,2,3,4-tetrahydroisoquinoline-2-carboxylate with an acid selected from the group consisting of (?)-(2S,3S)-tartaric acid, (+)-(2S,3S)-di-O-benzoyltartaric acid, (+)-(2S,3S)-di-O-(4-methylbenzoyl)tartaric acid, (?)-L-phenylalanine, benzenesulfonic acid, cyclohexanesulfamic acid, hydrobromic acid, naphthalene-2-sulfonic acid, sebacic acid, (+)-camphor-10-sulfonic acid, p-toluenesulfonic acid, ethanesulfonic acid, methanesulfonic acid and methyl phosphate, which has little hygroscopicity that affects the use as a drug or its drug substance, and is very useful as a drug or its drug substance.
    Type: Application
    Filed: May 13, 2005
    Publication date: September 14, 2006
    Inventors: Masahiko Hayakawa, Kiyohiro Samizu, Hiroshi Uebayashi, Ken Ikeda, Makoto Takeuchi
  • Publication number: 20050090498
    Abstract: There is provided medicaments, particularly a vascular endothelial growth factor (VEGF) inhibitor which is useful as a therapeutic drug for solid tumors, diabetic retinopathy and the like diseases in which angiogenesis is taking a role. That is, since a novel 3-quinolin-2(1H)-ylideneindolin-2-one derivative or a salt thereof has good VEGF inhibitory action, angiogenesis inhibitory action and anti-tumor action, it is useful as ideal VEGF inhibitor, angiogenesis inhibitor and anti-tumor agent.
    Type: Application
    Filed: May 23, 2002
    Publication date: April 28, 2005
    Inventors: Kiyohiro Samizu, Hiroyuki Hisamichi, Akira Matsuhisa, Isao Kinoyama, Masahiko Hayakawa, Nobuaki Taniguchi, Yukitaka Ideyama, Sadao Kuromitsu, Kiyoshi Yahiro, Minoru Okada
  • Publication number: 20040010037
    Abstract: This application relates to a piperazino-substituted novel cyanophenyl derivative in which a substituted carbamoyl or substituted sulfamoyl group having an aryl, heterocyclic or the like group that may have a substituent group is bonded to one nitrogen atom on the piperazine ring. The compound of this application has an anti-androgen action and is useful in preventing or treating prostatic cancer, benign prostatic hyperplasia and the like diseases.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 15, 2004
    Applicant: YAMANOUCHI PHARMACEUTICAL CO., LTD.
    Inventors: Nobuaki Taniguchi, Isao Kinoyama, Takashi Kamikubo, Akira Toyoshima, Kiyohiro Samizu, Eiji Kawaminami, Masakazu Imamura, Hiroyuki Moritomo, Akira Matsuhisa, Masaaki Hirano, Yoji Miyazaki, Eisuke Nozawa, Minoru Okada, Hiroshi Koutoku, Mitsuaki Ohta
  • Patent number: 6673799
    Abstract: This application relates to a piperazino-substituted novel cyanophenyl derivative in which a substituted carbamoyl or substituted sulfamoyl group having an aryl, heterocyclic or the like group that may have a substituent group is bonded to one nitrogen atom on the piperazine ring. The compound of this application has an anti-androgen action and is useful in preventing or treating prostatic cancer, benign prostatic hyperplasia and the like diseases.
    Type: Grant
    Filed: March 21, 2001
    Date of Patent: January 6, 2004
    Assignee: Yamanouchi Pharmaceutical Co. Ltd.
    Inventors: Nobuaki Taniguchi, Isao Kinoyama, Takashi Kamikubo, Akira Toyoshima, Kiyohiro Samizu, Eiji Kawaminami, Masakazu Imamura, Hiroyuki Moritomo, Akira Matsuhisa, Masaaki Hirano, Yoji Miyazaki, Eisuke Nozawa, Minoru Okada, Hiroshi Koutoku, Mitsuaki Ohta
  • Patent number: 5769393
    Abstract: A display element for use in computer terminals, television displays and other information display devices capable of large capacity, full color display employing active elements, wherein an optical layer comprises liquid crystal and polymer dispersed in one another. The polymer comprises polymer grains directionally aligned in the optical layer by directional alignment of the liquid crystal, which is aligned by treatment provided relative to at least one of the substrates forming the display element. The polymer grains are developed from the polymerization of at least one polymer precursor containing at least one polymerizable portion and at least two aromatic rings with a coupling group provided between the aromatic rings. The polymer precursor contains, as at least one component, a polymer compound without an alkyl group spacer between the polymerizable portion and the aromatic rings.
    Type: Grant
    Filed: August 16, 1993
    Date of Patent: June 23, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Hidekazu Kobayashi, Kiyohiro Samizu
  • Patent number: 5680185
    Abstract: A polymer dispersed liquid crystal display apparatus has a liquid crystal/polymer medium formed between spatially disposed electrodes formed spatially disposed substrates. The medium includes a polymer phase and a liquid crystal phase having optical axes alignable together in a predetermined direction. A light absorption additive is included in the liquid crystal phase to provide light absorption when said optical axes are aligned in said predetermined direction so that in the presence or absence of an electric field applied between said electrodes, two different conditions are achieved comprising alignment and misalignment of the optical axes of the liquid crystal phase relative to the polymer phase so that in one condition, a light absorption state is created in the medium and in the other condition, a light scattering state is created in the medium.
    Type: Grant
    Filed: April 15, 1994
    Date of Patent: October 21, 1997
    Assignee: Seiko Epson Corporation
    Inventors: Hidekazu Kobayashi, Kiyohiro Samizu, Eiji Chino, Jin Jei Wu
  • Patent number: 5305126
    Abstract: A polymer dispersed liquid crystal material (PDLC) device is fabricated by sealing a composite layer mixture of components comprising a polymer and liquid crystal material while both are in their liquid phase in a gap portion formed between two substrates of the device. A predetermined directional alignment is transmitted to the polymer via the liquid crystal material by means, for example, of formed directional alignment on surfaces in contact with the composite layer, such as, by deposited alignment films on a surface of at least one of the substrates. The predetermined directional alignment of the polymer is thereafter fixed by means of a polymer hardening method, such as, for example, by polymerization of a polymer precursor, so that the predetermined directional alignment of the polymer is permanently retain within the liquid crystal material, i.e., the polymer is in a solid phase and the liquid crystal material remains in its liquid phase.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: April 19, 1994
    Assignee: Seiko Epson Corporation
    Inventors: Hidekazu Kobayashi, Kiyohiro Samizu, Jin-Jei Wu