Patents Assigned to Kowa Co., Ltd.
  • Patent number: 7741424
    Abstract: The present invention is directed to a phosphoric ester of 2,3-dihydroxypropyl cellulose or 3-(2,3-dihydroxypropoxy)-2-hydroxypropyl cellulose, the cellulose having optionally undergone partial carbamidation, and to a metal absorbent employing the ester, and to a metal-absorbing apparatus employing the metal adsorbent. The cellulose derivative phosphoric ester serves as a metal adsorbent which exhibits high metal adsorption performance and metal adsorption rate per unit weight; has high mechanical strength; effectively soften water or a similar liquid; removes heavy metals from wastewater or a similar liquid at remarkably high efficiency; has excellent processability and can be formed into a variety of shapes and thus is applicable within a wide range; and can readily be reutilized.
    Type: Grant
    Filed: September 26, 2005
    Date of Patent: June 22, 2010
    Assignee: Kowa Co., Ltd.
    Inventors: Ming Lu, Katsumi Yabusaki
  • Patent number: 7741047
    Abstract: The present invention is directed to a method for treating autoimmune diseases comprising administering RBAp48 production suppressor or inhibitor; a screening method for a preventive or therapeutic agent for autoimmune diseases comprising determining RBAp48 production suppressing effect or inhibitory effect of a sample; a diagnosis agent or a diagnosing kit for autoimmune diseases containing a reagent for measuring RBAp48 level in gland tissue; and a diagnosis method for autoimmune diseases comprising measuring RBAp48 level in gland tissue.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: June 22, 2010
    Assignee: Kowa Co., Ltd.
    Inventor: Yoshio Hayashi
  • Publication number: 20100120732
    Abstract: Provided is an agent for prevention and/or treatment of systemic lupus erythematosus, which comprises, in combination, 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazine-3-one or a solvate thereof and a corticosteroid. The pharmaceutical agent of the present invention is orally administrable, has fewer adverse effects, exhibits an excellent effect of suppressing the symptoms associated with SLE, and thus is useful for prevention and treatment of SLE.
    Type: Application
    Filed: March 7, 2008
    Publication date: May 13, 2010
    Applicant: KOWA CO., LTD.
    Inventor: Yuichiro Tabunoki
  • Patent number: 7714141
    Abstract: The invention provides a process for producing an optically active butyric acid compound and a production intermediate therefore at high yield and high purity. The present invention provides a process for producing Compound (6), including reacting Compound (1) with optically active 2-trifluoromethanesulfonyloxybutyrolactone (2a) in the presence of a base or reacting optically active 2-hydroxybutyrolactone (2b) under Mitsunobu reaction conditions, to thereby form Compound (3); reacting Compound (3) with an alcohol and a halogenating agent, to thereby form Compound (4); dehalogenating Compound (4), to thereby form Compound (5); and de-esterifying Compound (5).
    Type: Grant
    Filed: May 30, 2006
    Date of Patent: May 11, 2010
    Assignee: Kowa Co., Ltd.
    Inventors: Yukiyoshi Yamazaki, Takaaki Araki, Minoru Koura, Kimiyuki Shibuya
  • Publication number: 20100086615
    Abstract: To provide a pulmonary disease therapeutic drug exhibiting high efficacy and reduced side effects. The pulmonary disease therapeutic drug of the invention for intratracheal administration contains biocompatible polymer nanoparticles including an HMG-CoA reductase inhibitor.
    Type: Application
    Filed: April 25, 2008
    Publication date: April 8, 2010
    Applicants: KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION, KOWA CO., LTD
    Inventors: Kensuke Egashira, Junji Kojima, Megumi Sakamoto
  • Publication number: 20100075972
    Abstract: To provide a preventive and/or therapeutic drug for multiple sclerosis, which has high efficacy against multiple sclerosis, which exhibits excellent safety, and which can be orally administered. The invention provides a preventive and/or therapeutic drug for multiple sclerosis, the drug containing, as an active ingredient, 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one or a solvate thereof.
    Type: Application
    Filed: January 28, 2008
    Publication date: March 25, 2010
    Applicant: Kowa Co., Ltd.
    Inventors: Masaki Yamabi, Yuichiro Tabunoki, Toshiyuki Edano
  • Publication number: 20100016358
    Abstract: The present invention is directed to a ?-globin inducer, to a prophylactic and/or therapeutic agent for sickle cell disease, and to a prophylactic and/or therapeutic agent for ?-thalassemia, each containing, as an active ingredient, 4-[N-(4-methoxyphenyl)-N-[[5-(3,4,5-trimethoxyphenyl)pyridin-3-yl]methyl]amino]-1-[[2-(3,4,5-trimethoxyphenyl)pyridin-4-yl]methyl]piperidine, a salt thereof, or a solvate of either of these.
    Type: Application
    Filed: October 12, 2007
    Publication date: January 21, 2010
    Applicant: KOWA CO., LTD.
    Inventors: Masaki Yamabi, Takeshi Doi
  • Patent number: 7648839
    Abstract: To provide a novel copper ion indicator which is less influenced by interfering metal ions and which is useful for measurement of copper ion within a wide concentration range. The invention provides a copper ion indicator containing a compound represented by formula (1): [wherein each of R1, R2, R3, R4, R5, and R6 represents a hydrogen atom or an alkali metal atom], and a method for determining copper ion concentration, which employs the indicator.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: January 19, 2010
    Assignee: Kowa Co., Ltd.
    Inventors: Maria Sakairi, Katsumi Yabusaki
  • Publication number: 20090317354
    Abstract: The present invention relates to a composition for repairing injured skin containing a saccharide and povidone-iodine. The present invention has the following characteristics: suppresses time-dependent increase of consistency, it is easy to use, it is a soft preparation, and has superior applicability to a deep wounded lesion and a granulation tissue. The composition of the present invention contains 50 to 90% by weight of saccharide, 0.5 to 10% by weight of povidone-iodine, 0.1 to 20% by weight of water and 0.01 to 10% by weight of phospholipid.
    Type: Application
    Filed: August 25, 2009
    Publication date: December 24, 2009
    Applicants: Kowa Co., Ltd., TEIKA PHARMACEUTICAL CO., LTD.
    Inventors: Masahiro Nishimura, Shihomi Nito, Toshio Inagi, Takahito Kimura
  • Patent number: 7629159
    Abstract: The present invention provides a stable complex microbial system, which simultaneously decomposes a plurality of organic contaminants even under a polluted environment with these contaminants and permits more effective decomposition of persistent organic contaminants such as PCNB and simazine. A support for holding a complexed enrichment of degrading bacteria, which contains a porous material provided as a support on which degrading bacteria A capable of degrading at least one organic contaminant and degrading bacteria B capable of degrading another organic contaminant are enriched, is produced. The degrading bacteria A may be a PCNB-degrading bacteria, particularly degrading bacteria containing degrading bacteria having part or all of the bacteriological characteristics of Nocardioides sp. PD653 and the degrading bacteria B may be degrading bacteria containing degrading bacteria having part or all of the bacteriological characteristics of ?-Proteobacteria CDB21.
    Type: Grant
    Filed: January 20, 2006
    Date of Patent: December 8, 2009
    Assignees: National Institute for Agro-Environmental Sciences Independent Administration Institute, Kowa Co. Ltd.
    Inventors: Kazuhiro Takagi, Naoki Harada, Yuuichi Yoshioka
  • Publication number: 20090291980
    Abstract: The present invention is directed to a triglyceride-lowering agent, exhibiting excellent triglyceride-lowering effect and a hyperinsulinemia-ameliorating agent. The triglyceride-lowering agent and hyperinsulinemia-ameliorating agent are characterized by containing a pitavastatin compound, and amlodipine or a salt thereof.
    Type: Application
    Filed: March 28, 2007
    Publication date: November 26, 2009
    Applicants: Nissan Chemical Industries Ltd., Kowa Co., Ltd.
    Inventors: Toru Yokoyama, Taro Aoki
  • Publication number: 20090281063
    Abstract: The present invention is to provide means to treat breast cancer and/or mastitis by topically administering a non-steroidal antiinflammatory analgetic agent and/or an anticancer agent and allowing them efficiently to arrive into the mammary gland. The present invention provides an iontophoretic preparation for treating breast cancer and/or mastitis which contains a non-steroidal antiinflammatory analgetic agent and/or an anticancer agent as an active ingredient and has a donor to be applied on a nipple part for topical administration of the active ingredient from the nipple part to the mammary gland by application of electric potential.
    Type: Application
    Filed: October 11, 2006
    Publication date: November 12, 2009
    Applicants: KOWA CO., LTD., TOKYO UNIVERSITY OF SCIENCE EDUCATIONAL FOUNDATION ADMINISTRATIVE ORGANIZATION
    Inventors: Toshio Inagi, Makoto Kanebako, Hiroshi Terada, Kimiko Makino, Masakazu Toi
  • Publication number: 20090281106
    Abstract: The present invention provides a prophylactic and/or therapeutic agent for rheumatoid arthritis comprising 2-benzyl-5-(4-chlorophenyl)-6-[4-(methylthio)phenyl]-2H-pyridazin-3-one and leflunomide in combination. The prophylactic and/or therapeutic agent of the present invention can be administered orally, exhibits an excellent arthritis suppressive effect with fewer side effects, and is therefore useful for the prophylaxis and/or treatment of rheumatoid arthritis.
    Type: Application
    Filed: August 30, 2006
    Publication date: November 12, 2009
    Applicant: Kowa Co., Ltd
    Inventors: Yuichiro Tabunoki, Tomoyuki Koshi
  • Publication number: 20090275595
    Abstract: There is to provide is an agent for reduction of a lipid rich plaque, stabilization of a lipid rich plaque and/or prevention of rupture of a lipid rich plaque in an atherosclerotic lesion comprising an effective amount of 2-[4-[2-(benzimidazole-2-ylthio)ethyl]piperazin-1-yl]-N-[2,4-bis(methylthio)-6-methyl-3-pyridyl]acetamide (hereinafter, referred to as compound 1), its pharmaceutically acceptable salt or a hydrate thereof and Pitavastatin, and a pharmaceutically acceptable carrier, wherein the agent is intended to be simultaneously administered, or separately administered with interval of time to a patient in need thereof.
    Type: Application
    Filed: December 9, 2005
    Publication date: November 5, 2009
    Applicant: KOWA CO., LTD.
    Inventors: Hideyuki Kobayashi, Yasunobu Yoshinaka, Kimiyuki Shibuya
  • Publication number: 20090270399
    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 (substituted) 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: Application
    Filed: July 6, 2009
    Publication date: October 29, 2009
    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
  • Publication number: 20090263907
    Abstract: To provide a lead concentration determination reagent which realizes accurate determination of the lead concentration of a sample solution in a simple manner with safety, even when the sample solution contains zinc ions, and a lead concentration determination method making use of the reagent. The lead concentration determination reagent contains (A) a porphyrin derivative and (B) at least one species selected from among ethylenediamine-N,N?-dipropionic acid, ethylenediamine-N,N?-diacetic acid, and 1,6-diaminohexane-N,N,N?,N?-tetraacetic acid.
    Type: Application
    Filed: August 27, 2007
    Publication date: October 22, 2009
    Applicant: KOWA CO., LTD.
    Inventors: Takaharu Asano, Katsumi Yabusaki, Keiichi Mizushina
  • Patent number: 7598233
    Abstract: This invention relates to a method for treating thrombosis by combined administration of a pitavastatin with aspirin.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: October 6, 2009
    Assignees: Kowa Co., Ltd., Nissan Chemical Industries, Ltd.
    Inventors: Toru Yokoyama, Taro Aoki
  • Patent number: 7582791
    Abstract: A process for producing an optically active 2-hydroxybutyric ester (1), characterized by including reacting an optically active 2,3-epoxybutyric ester (2) with a thiol in the presence of scandium trifluoromethanesulfonate or ytterbium trifluoromethanesulfonate, to thereby produce Compound (3), and subjecting Compound (3) to desulfurization reaction: (wherein R represents a C1 to C6 alkyl group or a C7 or C8 aralkyl group; R1 represents a C1 to C12 alkyl group or a phenyl group; and * represents S- or R-absolute configuration). The present invention provides a process for producing an optically active 2-hydroxybutyric ester at high yield and high optical purity.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: September 1, 2009
    Assignee: Kowa Co., Ltd.
    Inventors: Takaaki Araki, Yukiyoshi Yamazaki, Kimiyuki Shibuya
  • Publication number: 20090209780
    Abstract: To provide a process for producing an optically active 2-hydroxybutyric ester at high yield and high optical purity. The process for producing an optically active 2-hydroxybutyric ester (1), characterized in that the process includes reacting an optically active 2,3-epoxypropionic ester (2) with a methyl Grignard reagent CH3MgX (wherein X represents a halogen atom) in the presence of a copper catalyst in an amount of 0.05 to 0.5 mol with respect to 1 mol of (2) through the following scheme: (wherein R represents a C1 to C6 alkyl group or a C7 or C8 aralkyl group; X represents a halogen atom; and * represents S- or R-absolute configuration).
    Type: Application
    Filed: July 27, 2006
    Publication date: August 20, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Minoru Koura, Yukiyoshi Yamazaki, Kimiyuki Shibuya
  • Publication number: 20090209765
    Abstract: To provide an effective and simple process for producing 4-fluoroisoquinoline-5-sulfonyl halide or a salt thereof, and a simple method for separating for purification of the product from a by-produced position isomer thereof. The process for producing 4-fluoroisoquinoline-5-sulfonyl halide or a salt thereof, characterized in that the process includes reacting 4-fluoroisoquinoline or a salt thereof with sulfuric anhydride in the presence or absence of sulfuric acid, to thereby form 4-fluoroisoquinoline-5-sulfonic acid or a salt thereof, and, subsequently, reacting the formed sulfonic acid compound with a halogenating reagent.
    Type: Application
    Filed: February 23, 2006
    Publication date: August 20, 2009
    Applicant: Kowa Co., Ltd.
    Inventors: Hitoshi Sakai, Masayuki Masumoto, Jyunji Katsuyama, Kazuhiro Onogi