Patents by Inventor Kazuo Sekiguchi

Kazuo Sekiguchi 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: 8722663
    Abstract: The present invention provides a novel compound having an excellent antitumor effect. The compound of the present invention is represented by the following general formula (1) wherein R1 and R2 are aryl or the like; A is lower alkylene; Ring X is optionally substituted arylene; E is bond or lower alkenylene; Ring Y is optionally substituted heterocycloalkylene containing one or more nitrogen atoms, one of which is attached to the adjacent carbonyl group; G is —NH-G2-, —N(lower alkyl)-G2-, —NH—CH2-G2-, —N(lower alkyl)-CH2-G2- or —CH2-G2-, [wherein G2 binds to R2, G2-R2 is bond-R2, phenylene-G3-R2, phenylene-G4-O—R2, phenylene-G5-NH—R2, phenylene-G6-N(lower alkyl)-R2 or quinolinediyl-O—R2, the phenylene of said phenylene-containing groups being optionally substituted with one or more substituents; G3-R2 is —O-lower alkylene-R2 or the like; G4-O— is lower alkylene-O— or the like; G5 is lower alkylene; G6 is lower alkylene].
    Type: Grant
    Filed: January 28, 2011
    Date of Patent: May 13, 2014
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hideki Takasu, Shigekazu Fujita, Shinya Ohtsuka, Toshiyuki Hirose, Yosuke Sato, Satoshi Yamada, Keisuke Miyajima, Koji Sakai, Yutaka Kojima, Kazuo Sekiguchi, Yasuo Yanagihara, Takashi Suzuki, Hideo Tanaka, Kazuhisa Sugiyama, Mitsuhiro Okuno, Takumi Sumida
  • Patent number: 8551999
    Abstract: The present invention provides a heterocyclic compound represented by General Formula (1): wherein R1 is a group R5—Z1—, etc., Z1 is a lower alkylene group, etc., and R5 is a group represented by General Formula; wherein R13 is a hydrogen atom, etc., m is an integer from 1 to 5; R2 is a hydrogen atom: Y is CH or N: A1 is a heterocyclic ring selected from the group consisting of indolediyl groups, wherein the heterocyclic ring may have at least one substituent: T is a group —CO—, etc.: R3 is a hydrogen atom, etc.: R4 is a lower alkyl group optionally substituted by one or more hydroxy groups, etc.: R3 and R4, together with the nitrogen atom to which they bind, may bind to each other and form a 5- to 10-membered saturated heterocyclic ring, wherein the heterocyclic ring may have at least one substituent. The heterocyclic compound of the present invention has excellent effects of suppressing the production of collagen and/or treating tumors.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: October 8, 2013
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Takumi Sumida, Fujio Tabusa, Kazuo Sekiguchi, Takeshi Kodama, Koichi Yasumura, Yutaka Kojima, Masaaki Motoyama, Keisuke Miyajima, Kenji Yoshida, Keizo Kan, Makoto Sakamoto, Hideki Takasu, Takashi Nakagawa, Naoto Ohi, Yasuo Harada, Norikazu Hashimoto, Hironori Matsuyama, Masatoshi Iida, Shigekazu Fujita, Tae Fukushima
  • Publication number: 20120322807
    Abstract: The present invention provides a STAT3/5 activation inhibitor containing an aromatic compound represented by the general formula or a salt thereof as an active ingredient: Wherein X1 represents a nitrogen atom or a group —CH?, R1 represents a group —Z—R6, in which Z represents a group —CO—, a group —CH(OH)— or the like, R6 represents a 5- to 15-membered monocyclic, dicyclic or tricyclic saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms or sulfur atoms, R2 represents a hydrogen atom or a halogen atom, Y represents a group —O—, a group —CO—, a group —CH(OH)— or a lower alkylene group, and A represents a group
    Type: Application
    Filed: June 18, 2012
    Publication date: December 20, 2012
    Inventors: Kazuo Sekiguchi, Takashi Suzuki, Yutaka Ohbuchi, Mitsuhiro Okuno, Naoto Ohi, Kenji Ohnishi, Masaaki Motoyama, Kenji Yoshida, Takeshi Kodama, Kazuhisa Sugiyama, Seiji Akamatsu, Kunihiko Kiyono, Yasuo Yanagihara, Takashi Watanabe, Kazuhiko Hayashi, Hideo Tanaka, Takumi Sumida
  • Publication number: 20120283242
    Abstract: The present invention provides a novel compound having an excellent antitumor effect. The compound of the present invention is represented by the following general formula (1) wherein R1 and R2 are aryl or the like; A is lower alkylene; Ring X is optionally substituted arylene; E is bond or lower alkenylene; Ring Y is optionally substituted heterocycloalkylene containing one or more nitrogen atoms, one of which is attached to the adjacent carbonyl group; G is —NH-G2-, —N(lower alkyl)-G2-, —NH—CH2-G2-, —N(lower alkyl)-CH2-G2- or —CH2-G2-, [wherein G2 binds to R2, G2-R2 is bond-R2, phenylene-G3-R2, phenylene-G4-O—R2, phenylene-G5-NH—R2, phenylene-G6-N(lower alkyl)-R2 or quinolinediyl-O—R2, the phenylene of said phenylene-containing groups being optionally substituted with one or more substituents; G3-R2 is —O-lower alkylene-R2 or the like; G4-O— is lower alkylene-O— or the like; G5 is lower alkylene; G6 is lower alkylene].
    Type: Application
    Filed: January 28, 2011
    Publication date: November 8, 2012
    Inventors: Hideki Takasu, Shigekazu Fujita, Shinya Ohtsuka, Toshiyuki Hirose, Yosuke Sato, Satoshi Yamada, Keisuke Miyajima, Koji Sakai, Yutaka Kojima, Kazuo Sekiguchi, Yasuo Yanagihara, Takashi Suzuki, Hideo Tanaka, Kazuhisa Sugiyama, Mitsuhiro Okuno, Takumi Sumida
  • Patent number: 8263599
    Abstract: An object of the present invention is to provide a STAT3/5 activation inhibitor. The present invention provides a STAT3/5 activation inhibitor containing an aromatic compound represented by the general formula or a salt thereof as an active ingredient: wherein X1 represents a nitrogen atom or a group —CH?, R1 represents a group —Z—R6, in which Z represents a group —CO—, a group —CH(OH)— or the like, R6 represents a 5- to 15-membered monocyclic, dicyclic or tricyclic saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms or sulfur atoms, R2 represents a hydrogen atom or a halogen atom, Y represents a group —O—, a group —CO—, a group —CH(OH)— or a lower alkylene group, and A represents a group wherein R3 represents a hydrogen atom, a lower alkoxy group or the like, p represents 1 or 2, R4 represents an imidazolyl lower alkyl group or the like.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: September 11, 2012
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Kazuo Sekiguchi, Takashi Suzuki, Yutaka Ohbuchi, Mitsuhiro Okuno, Naoto Ohi, Kenji Ohnishi, Masaaki Motoyama, Kenji Yoshida, Takeshi Kodama, Kazuhisa Sugiyama, Seiji Akamatsu, Kunihiko Kiyono, Yasuo Yanagihara, Takashi Watanabe, Kazuhiko Hayashi, Hideo Tanaka, Takumi Sumida
  • Patent number: 8030075
    Abstract: An object of the present invention is to provide a nucleic acid delivery carrier composition of low toxicity and high safety, the carrier composition, when used to administer a nucleic acid such as an siRNA into an animal-derived cell or organism, being capable of delivering efficiently the nucleic acids into the cells while protecting it from being degraded; and a nucleic acid deliver composition containing the carrier and a nucleic acid. The carrier composition for delivery of a nucleic acid is prepared by mixing (A) a cationic lipid having a steroid skeleton with (B) a tertiary ammonium salt-type cationic lipid. The nucleic acid delivery composition is prepared by mixing the nucleic acid delivery carrier with a nucleic acid.
    Type: Grant
    Filed: October 17, 2006
    Date of Patent: October 4, 2011
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hidekazu Toyobuku, Hideo Miyao, Masako Sato, Kazuo Sekiguchi
  • Patent number: 7932276
    Abstract: The present invention provides a useful and highly safe agent for the treatment of chronic obstructive pulmonary disease, which contains, as the effective ingredient, at least one compound selected from the group consisting of thiazole derivatives and salts thereof represented by the general formula (1), wherein, R1 is a phenyl group which may have 1 to 3 lower alkoxy groups as the substituents on the phenyl ring; R2 is a pyridyl group which may have 1 to 3 carboxyl groups as the substituents on the pyridine ring.
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: April 26, 2011
    Assignee: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Kazuo Sekiguchi, Katsumi Ikezono, Kazuhide Ohta, Takashi Maeda, Hisashi Nagamoto
  • Publication number: 20100261720
    Abstract: The present invention provides a heterocyclic compound represented by General Formula (1): wherein R1 is a group R5—Z1—, etc., Z1 is a lower alkylene group, etc., and R5 is a group represented by General Formula; wherein R13 is a hydrogen atom, etc., m is an integer from 1 to 5; R2 is a hydrogen atom: Y is CH or N: A1 is a heterocyclic ring selected from the group consisting of indolediyl groups, wherein the heterocyclic ring may have at least one substituent: T is a group —CO—, etc.: R3 is a hydrogen atom, etc.: R4 is a lower alkyl group optionally substituted by one or more hydroxy groups, etc.: R3 and R4, together with the nitrogen atom to which they bind, may bind to each other and form a 5- to 10-membered saturated heterocyclic ring, wherein the heterocyclic ring may have at least one substituent. The heterocyclic compound of the present invention has excellent effects of suppressing the production of collagen and/or treating tumors.
    Type: Application
    Filed: October 29, 2008
    Publication date: October 14, 2010
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Takumi Sumida, Fujio Tabusa, Kazuo Sekiguchi, Takeshi Kodama, Koichi Yasumura, Yutaka Kojima, Masaaki Motoyama, Keisuke Miyajima, Kenji Yoshida, Keizo Kan, Makoto Sakamoto, Hideki Takasu, Takashi Nakagawa, Naoto Ohi, Yasuo Harada, Norikazu Hashimoto, Hironori Matsuyama, Masatoshi Iida, Shigekazu Fujita, Tae Fukushima
  • Publication number: 20100210661
    Abstract: An object of the present invention is to provide a STAT3/5 activation inhibitor. The present invention provides a STAT3/5 activation inhibitor containing an aromatic compound represented by the general formula or a salt thereof as an active ingredient: wherein X1 represents a nitrogen atom or a group —CH?, R1 represents a group —Z—R6, in which Z represents a group —CO—, a group —CH(OH)— or the like, R6 represents a 5- to 15-membered monocyclic, dicyclic or tricyclic saturated or unsaturated heterocyclic group having 1 to 4 nitrogen atoms, oxygen atoms or sulfur atoms, R2 represents a hydrogen atom or a halogen atom, Y represents a group —O—, a group —CO—, a group —CH(OH)— or a lower alkylene group, and A represents a group wherein R3 represents a hydrogen atom, a lower alkoxy group or the like, p represents 1 or 2, R4 represents an imidazolyl lower alkyl group or the like.
    Type: Application
    Filed: October 2, 2007
    Publication date: August 19, 2010
    Applicant: OTSUKA PHARMACEUTICAL CO., LTD.
    Inventors: Kazuo Sekiguchi, Takashi Suzuki, Yutaka Ohbuchi, Mitsuhiro Okuno, Naoto Ohi, Kenji Ohnishi, Masaaki Motoyama, Kenji Yoshida, Takeshi Kodama, Kazuhisa Sugiyama, Seiji Akamatsu, Kunihiko Kiyono, Yasuo Yanagihara, Takashi Watanabe, Kazuhiko Hayashi, Hideo Tanaka, Takumi Sumida
  • Publication number: 20090258923
    Abstract: An object of the present invention is to provide a nucleic acid delivery carrier composition of low toxicity and high safety, the carrier composition, when used to administer a nucleic acid such as an siRNA into an animal-derived cell or organism, being capable of delivering efficiently the nucleic acids into the cells while protecting it from being degraded; and a nucleic acid deliver composition containing the carrier and a nucleic acid. The carrier composition for delivery of a nucleic acid is prepared by mixing (A) a cationic lipid having a steroid skeleton with (B) a tertiary ammonium salt-type cationic lipid. The nucleic acid delivery composition is prepared by mixing the nucleic acid delivery carrier with a nucleic acid.
    Type: Application
    Filed: October 17, 2006
    Publication date: October 15, 2009
    Applicant: Otsuka Pharmaceutical Co., Ltd.
    Inventors: Hidekazu Toyobuku, Hideo Miyao, Masako Sato, Kazuo Sekiguchi
  • Publication number: 20080081828
    Abstract: The present invention provides a useful and highly safe agent for the treatment of chronic obstructive pulmonary disease, which contains, as the effective ingredient, at least one compound selected from the group consisting of thiazole derivatives and salts thereof represented by the general formula (1), wherein, R1 is a phenyl group which may have 1 to 3 lower alkoxy groups as the substituents on the phenyl ring; R2 is a pyridyl group which may have 1 to 3 carboxyl groups as the substituents on the pyridine ring.
    Type: Application
    Filed: June 8, 2007
    Publication date: April 3, 2008
    Inventors: Kazuo Sekiguchi, Katsumi Ikezono, Kazuhide Ohta, Takashi Maeda, Hisashi Nagamoto
  • Publication number: 20040147563
    Abstract: The present invention provides a useful and highly safe agent for curing chronic obstructive pulmonary disease, which contains, as the effective ingredient, at least one compound selected from the group consisting of thiazole derivatives and salts thereof represented by the general formula (1), 1
    Type: Application
    Filed: November 21, 2003
    Publication date: July 29, 2004
    Inventors: Kazuo Sekiguchi, Katsumi Ikezono, Kazuhide Ohta, Takashi Maeda, Hisashi Nagamoto
  • Patent number: 6534044
    Abstract: The invention relates to (1) a cosmetic material comprising silica-coated metal oxide particles further surface-treated with a hydrophobicizing agent, and (2) metal oxide particles having a specified infrared absorption spectrum intensity ratio and refractive index which are further treated with a hydrophobicizing agent, and to a process for their production. The invention further relates to a silica-coated metal oxide sol which gives such particles, and to a process for its production. The invention can give ultraviolet-screening cosmetic materials with an excellent transparent feel, wherein the particles are satisfactorily dispersed.
    Type: Grant
    Filed: July 11, 2001
    Date of Patent: March 18, 2003
    Assignee: Showa Denko K.K
    Inventors: Koichi Wada, Nobuaki Ishii, Mitsuharu Irie, Kazuo Sekiguchi, Michihiro Takama
  • Patent number: 6281277
    Abstract: The present invention provides homogeneously surface-fluorinated metal oxide particulates, characterized in that a metal oxide particulate such as Ti, Al, Si, Ag, Cu, Fe, Zr, Ce, Mn, Sn, Ge and Ta is surface reacted with fluorine gas while allowing the metal oxide particulate to flow, and also provides a process for manufacturing the metal oxide particulates. The homogeneously surface-fluorinated metal oxide particulates according to the present invention are useful as an additive for a weatherproof coating material, a weatherproof resin or a cosmetic material. Furthermore, according to the process of the present invention, the surface of a metal oxide particulate can be homogeneously fluorinated at any ratio in a very simple and efficient manner.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: August 28, 2001
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Nobuaki Ishii, Koichi Wada, Kazuo Sekiguchi, Hiroyuki Takahashi
  • Patent number: 6235270
    Abstract: Cosmetics comprising silica-coated metal oxide powder having a thickness of the silica coating of 0.1 to 100 nm, and a photocatalytic activity as measured by tetralin auto-oxidation method of 6 mmH2O/min or less. Silica-coated metal oxide powder coated with a silica coating having an absorption peak intensity ratio I (I=I1/I2, wherein I1 is an absorption peak intensity at 1,150 to 1,250 cm−1 and I2 is an absorption peak intensity at 1,000 to 1,100 cm−1) between the infrared absorption spectra in the region of 1,150 to 1,250 cm−1 and the region of 1,000 to 1,100 cm−1 of 0.2 or more, and having a refractive index of 1.435 or more.
    Type: Grant
    Filed: April 20, 1998
    Date of Patent: May 22, 2001
    Assignee: Showa Denko K.K.
    Inventors: Nobuaki Ishii, Koichi Wada, Kazuo Sekiguchi, Michihiro Takama, Shinobu Ito, Kotaro Yano, Yasuo Saito, Keiji Kawasaki
  • Patent number: 5321220
    Abstract: A pressure switch comprises an electrically conductive housing, a stationary contact stationarily installed in the housing and a movable contact movably received in the housing. The movable contact is movable to contact with the stationary contact. A hydraulically operated moving device is employed for moving the movable contact in accordance with a hydraulic pressure applied thereto. The stationary contact is formed with a blind bore. An end piece to which an end of an electric cable has been connected is press-fitted in the blind bore.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: June 14, 1994
    Assignee: Unisia Jecs Corporation
    Inventor: Kazuo Sekiguchi
  • Patent number: 4898781
    Abstract: Water-soluble microcapsules using a water-containing hydrophilic substance as a core material and at least one member selected from the group consisting of polyvinyl alcohol and modified polyvinyl alcohols as a coating material are stably retained in a concentrated aqeuous solution and are dissolved in water or a dilute aqueous solution.
    Type: Grant
    Filed: November 9, 1987
    Date of Patent: February 6, 1990
    Assignee: Showa Denko K.K.
    Inventors: Takashi Onouchi, Hironori Sugai, Kazuo Sekiguchi, Yoshikazu Hosoda, Eiichi Yoshida
  • Patent number: 4260813
    Abstract: Ethyl acetate and an excess of ethylene glycol monoethyl ether are subjected to ester-interchange reaction at a temperature not exceeding 100.degree. C. in the presence of a strongly acidic cation exchange resin as a catalyst. The resulting reaction mixture is distilled to recover the ethylene glycol monoethyl ether acetate formed. The unchanged reactants are recycled to the reaction zone for re-use, and the by-product ethanol is recovered in a highly pure form. This method can be continuously performed easily and effectively without the need to separate the catalyst or to employ complex distilling steps and without involving other difficulties.
    Type: Grant
    Filed: January 31, 1979
    Date of Patent: April 7, 1981
    Assignee: Showa Denko K.K.
    Inventors: Norio Kametaka, Kuniomi Marumo, Kiyonori Tokuda, Kazuo Sekiguchi
  • Patent number: 4002821
    Abstract: A grommet is disclosed, which grommet comprises a female member of a U-shaped end face containing a U groove for accommodating a stretched cord and provided at one extremity of said U groove with an elevated wall rising from the bottom of said groove and at the other extremity with a projecting wall extending inwardly from one side wall and a male member adapted to fit the U groove of the female member for fast engagement therewith, whereby the engagement of the male and female members gives rise to a laterally elongate opening on the side incorporating said elevated wall and a longitudinally elongate opening on the side incorporating the projecting wall. When the male and female members are brought into mutual engagement with a cord interposed therebetween, the cord is fastened in position in its twisted state within the grommet.
    Type: Grant
    Filed: June 24, 1976
    Date of Patent: January 11, 1977
    Assignee: Nifco Inc.
    Inventors: Sei'ichi Satoh, Kazuo Sekiguchi