Patents by Inventor Keiji Kubo

Keiji Kubo 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: 20090252932
    Abstract: An active energy ray-curable resin composition is handleable when it is formed into an uncured film. The resin composition cures quickly, is formable, and can be used to make a hard coat layer with a high hardness. Specifically, the active energy ray-curable resin composition of the present invention contains a vinyl polymer having alkoxysilyl groups in its side chain, along with a photoacid generator. In its uncured state, the active energy ray-curable resin composition has a glass transition temperature of 15° C. to 100° C.
    Type: Application
    Filed: December 15, 2005
    Publication date: October 8, 2009
    Applicant: Kuraray Co., Ltd.
    Inventors: Takahiro Kitano, Hiroshi Matsugi, Takashi Imazu, Keiji Kubo, Masayasu Ogushi, Hirokazu Suzuki
  • Patent number: 7534887
    Abstract: A thiazoline derivative represented by Formula (I): wherein R is a cyclic hydrocarbon group which may be substituted, or a heterocyclic group which may be substituted; X is a bond or a divalent chain hydrocarbon group which may be substituted; X? is a bond or —N(R5)—; Y is a divalent hydrocarbon group which may be substituted; Y? is a bond or —C(?O)—; ring A is a nitrogen-containing heterocycle which may be substituted; Z1 and Z3 are each independently a bond or a divalent chain hydrocarbon group which may be substituted; Z2 is a bond or —N(R6)—; and B is a group represented by the formula: which is useful as a therapeutic drug for thrombosis, is provided.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: May 19, 2009
    Assignee: Takeda Pharmaceutical Company Limited
    Inventors: Keiji Kubo, Takanobu Kuroita, Masaki Kawamura, Hiroki Sakamoto
  • Publication number: 20090105253
    Abstract: The present invention relates to a thrombin receptor antagonist containing a compound represented by the formula (I) wherein R1a, R1b and R2 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group, or an optionally substituted alkoxy, R3 is a group represented by the formula —NHCOR4, —NHSO2R5, —NHCON(R6a)(R6b), —NHCOOR7 or —CONHR8 wherein R4, R5, R6a, R6b, R7 and R8 are each a hydrogen atom, an optionally substituted hydrocarbon group, an optionally substituted heterocyclic group and the like), ring A is monocyclic aromatic ring optionally further having substituent(s), R1a and R1b are optionally bonded to each other to form an optionally substituted nitrogen-containing non-aromatic heterocycle, or a salt thereof or a prodrug thereof.
    Type: Application
    Filed: April 6, 2006
    Publication date: April 23, 2009
    Inventors: Keiji Kubo, Mamoru Tobisu, Eiji Honda, Takahiko Taniguchi, Yoshiyuki Fukase, Masaki Kawamura, Masaharu Nakayama
  • Publication number: 20080255362
    Abstract: The present invention provides a cyclic amide derivative useful as a drug for treating thrombosis, which is represented by the formula (I): wherein R1 represents an optionally substituted cyclic hydrocarbon group or an optionally substituted heterocyclic group, W represents a bond or an optionally substituted divalent chain hydrocarbon group, a represents 0, 1, or 2, X1 represents an optionally substituted lower alkylene or an optionally substituted lower alkenylene, Y1 represents —C(O)—, —S(O)— or —S(O)2—, A represents a piperazine ring which may be further substituted or a piperidine ring which may be further substituted, X2 represents a bond or an optionally substituted lower alkylene, Y2 represents —C(O)—, —S(O)—, —S(O)2— or —C(?NR7)—, X3 represents an optionally substituted C1-4 alkylene or an optionally substituted C2-4 alkenylene, Z3 represents —N(R4)—, —O— or a bond, Z1 represents —C(R2)(R2?)—, —N(R2)—, etc., and Z2 represents —C(R3)(R3?)—, —N(R3)—, etc., or a salt thereof.
    Type: Application
    Filed: June 11, 2008
    Publication date: October 16, 2008
    Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITED
    Inventors: Keiji Kubo, Yasuhiro Imaeda
  • Publication number: 20080255352
    Abstract: The present invention provides a cyclic amide derivative useful as a drug for treating thrombosis, which is represented by the formula (I): wherein R1 represents an optionally substituted cyclic hydrocarbon group or an optionally substituted heterocyclic group, W represents a bond or an optionally substituted divalent chain hydrocarbon group, a represents 0, 1, or 2, X1 represents an optionally substituted lower alkylene or an optionally substituted lower alkenylene, Y1 represents —C(O)—, —S(O)— or —S(O)2—, A represents a piperazine ring which may be further substituted or a piperidine ring which may be further substituted, X2 represents a bond or an optionally substituted lower alkylene, Y2 represents —C(O)—, —S(O)—, —S(O)2— or —C(?NR7)—, X3 represents an optionally substituted C1-4 alkylene or an optionally substituted C2-4 alkenylene, Z3 represents —N(R4)—, —O— or a bond, Z1 represents —C(R2)(R2?)—, —N(R2)—, etc., and Z2 represents —C(R3)(R3?)—, —N(R3)—, etc., or a salt thereof.
    Type: Application
    Filed: June 11, 2008
    Publication date: October 16, 2008
    Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITED
    Inventors: Keiji Kubo, Yasuhiro Imaeda
  • Publication number: 20070244118
    Abstract: The present invention provides a cyclic amide derivative useful as a drug for treating thrombosis, which is represented by the formula (I)-: wherein R1 represents an optionally substituted cyclic hydrocarbon group or an optionally substituted heterocyclic group, W represents a bond or an optionally substituted divalent chain hydrocarbon group, a represents 0, 1, or 2, X1 represents an optionally substituted lower alkylene or an optionally substituted lower alkenylene, Y1 represents —C(O)—, —S(O)— or —S(O)2—, A represents a piperazine ring which may be further substituted or a piperidine ring which may be further substituted, X2 represents a bond or an optionally substituted lower alkylene, Y2 represents —C(O)—, —S(O)—, —S(O)2— or —C(?NR7)—, X3 represents an optionally substituted C1-4 alkylene or an optionally substituted C2-4 alkenylene, Z3 represents —N(R4)—, —O— or a bond, Z1 represents —C(R2)(R2?)—, —N(R2)—, etc., and Z2 represents —C(R3)(R3?)—, —N(R3)—, etc., or a salt thereof.
    Type: Application
    Filed: May 20, 2005
    Publication date: October 18, 2007
    Applicant: TAKEDA PHARMACEUTICAL COMPANY
    Inventors: Keiji Kubo, Yasuhiro Imaeda
  • Publication number: 20070093501
    Abstract: The present invention provides a urea derivative or a salt thereof, which is useful as a therapeutic agent for thrombosis.
    Type: Application
    Filed: December 15, 2004
    Publication date: April 26, 2007
    Applicant: TAKEDA PHARMACEUTICAL COMPANY LIMITED
    Inventors: Keiji Kubo, Yasuhiro Imaeda
  • Publication number: 20070010528
    Abstract: A thiazoline derivative represented by Formula (I): wherein R is a cyclic hydrocarbon group which may be substituted, or a heterocyclic group which may be substituted; X is a bond or a divalent chain hydrocarbon group which may be substituted; X? is a bond or —N(R5)—; Y is a divalent hydrocarbon group which may be substituted; Y? is a bond or —C(?O)—; ring A is a nitrogen-containing heterocycle which may be substituted; Z1 and Z3 are each independently a bond or a divalent chain hydrocarbon group which may be substituted; Z2 is a bond or —N(R6)—; and B is a group represented by the formula: which is useful as a therapeutic drug for thrombosis, is provided.
    Type: Application
    Filed: September 29, 2004
    Publication date: January 11, 2007
    Inventors: Keiji Kubo, Takanobu Kuroita, Masaki Kawamura, Hiroki Sakamoto
  • Publication number: 20070004736
    Abstract: There is provided an imidazole derivative useful as a thrombosis treating agent, which is represented by the formula (I): wherein R represents an optionally substituted cyclic hydrocarbon group or an optionally substituted heterocyclic group, W represents a bond or an optionally substituted divalent linear hydrocarbon group, X represents an optionally substituted divalent hydrocarbon group, Y represents —CO—, —S(O)—, —S(O)2— or a bond, ring A represents an optionally substituted pyrrolidine ring, an optionally substituted piperidine ring or an optionally substituted perhydroazepine ring, Z1 and Z3 independently represent a bond or an optionally substituted divalent linear hydrocarbon group, Z2 represents —N(R1)—, —O—, —S(O)—, —S(O)2—, —CO—, —CH(R1)— or a bond, ring B represents an optionally substituted imidazole ring, wherein a substituent which the optionally substituted imidazole ring represented by ring B may have may be taken together with R1 to form an optionally substituted ring, and a represents
    Type: Application
    Filed: November 20, 2003
    Publication date: January 4, 2007
    Inventors: Keiji Kubo, Takanobu Kuroita, Yasuhiro Imaeda, Masaki Kawamura
  • Patent number: 7135490
    Abstract: A treatment for glomerulonephritis is disclosed comprising administering (±)-1-(cyclohexyloxycarbonyloxy)ethyl 2-ethoxy-1 -[[2?-(1H-tetrazol-5-yl)biphenyl-4-yl]methyl]-1H-benzimidazole-7-carboxylate.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: November 14, 2006
    Assignee: Takeda Pharmaceutical Company, Limited
    Inventors: Kohei Nishikawa, Yumiko Shibouta, Keiji Kubo
  • Publication number: 20050222293
    Abstract: A curable resin composition with excellent thermal adhesiveness is constituted of the following components (A) to (C): (A) a thermoadhesive polymer; (B) an ethylenic unsaturated compound polymerizable by active energy radiation; and (C) a polymerization initiator, wherein the relationships represented by the following formulas (1) and (2) are satisfied: 0.1?(Awt)/{(Awt)+(Bwt)}?0.6??(1) 0.4?(Bwt)/{(Awt)+(Bwt)}?0.9??(2) where (Awt) stands for a compounded amount (parts by weight) of component (A), and (Bwt) stands for a compounded amount (parts by weight) of component (B).
    Type: Application
    Filed: May 25, 2005
    Publication date: October 6, 2005
    Applicant: Kuraray Co., Ltd.
    Inventors: Takahiro Kitano, Hirokazu Suzuki, Keiji Kubo, Masayasu Ogushi, Kazutoshi Terada, Tsuneo Kawabata, Masaki Kojima
  • Publication number: 20040082636
    Abstract: This invention relates to prophylactic or therapeutic drug for diabetic nephropathy or glomerulonephritis, comprising, as an active ingredient, a compound or salt thereof represented by general formula (I) 1
    Type: Application
    Filed: October 2, 2003
    Publication date: April 29, 2004
    Applicant: TAKEDA CHEMICAL INDUSTRIES, LTD.
    Inventors: Kohei Nishikawa, Yumiko Shibouta, Keiji Kubo
  • Patent number: 6723722
    Abstract: Novel acylhydrazine derivatives exhibiting an inhibitory activity against activated blood coagulation factor X, which are compounds of general formula (I) or salts thereof, wherein R is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; R1 and R2 are each hydrogen or optionally substituted hydrocarbyl, or alternatively R1 and R2 or the substituent of X1 and R2 may be united to form an optionally substituted ring; X1 and X2 are each free valency, optionally substituted alkylene, or optionally substituted imino; D is oxygen or sulfur; A is —N(R3)—Y— or —N═Y—, R3 is hydrogen, optionally substituted hydrocarbyl, or acyl; Y is an optionally substituted chain hydrocarbon group or an optionally substituted cyclic group; and Z is (1) optionally substituted amino, (2) optionally substituted imidoyl, or (3) an optionally substituted nitrogenous heterocycle group.
    Type: Grant
    Filed: December 18, 2001
    Date of Patent: April 20, 2004
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Fumio Itoh, Hiroshi Hosono, Masaki Kawamura, Keiji Kubo
  • Patent number: 6686383
    Abstract: This invention relates to methods for the prophylaxis or treatment of diabetic nephropathy comprising, administering as an active ingredient, a compound, or salt thereof, of formula (I) wherein R1 stands for H or lower alkyl; R2 stands for an optionally esterified carboxyl group; R3 stands for a group actually or potentially capable of forming an anion; X shows that the phenylene and phenyl groups bind to each other directly or through a spacer having an atomic chain length of two or less; n stands for 1 or 2; ring A stands for a benzene ring; Y stands for a bond, —O—, —S(O)m— wherein m stands for 0, 1 or 2, or —N(R4)— wherein R4 stands for H or an optionally substituted alkyl group).
    Type: Grant
    Filed: August 26, 2002
    Date of Patent: February 3, 2004
    Assignee: Takeda Chemical Industries, LTD
    Inventors: Kohei Nishikawa, Yumiko Shibouta, Keiji Kubo
  • Publication number: 20030236318
    Abstract: A curable resin composition with excellent thermal adhesiveness is constituted of the following components (A) to (C):
    Type: Application
    Filed: April 14, 2003
    Publication date: December 25, 2003
    Applicant: Kuraray Co., Ltd.
    Inventors: Takahiro Kitano, Hirokazu Suzuki, Keiji Kubo, Masayasu Ogushi, Kazutoshi Terada, Tsuneo Kawabata, Masaki Kojima
  • Publication number: 20030187023
    Abstract: A compound represented by the formula: 1
    Type: Application
    Filed: January 16, 2003
    Publication date: October 2, 2003
    Inventors: Keiji Kubo, Toshio Miyawaki, Masaki Kawamura
  • Patent number: 6610372
    Abstract: This invention aims to make it possible to obtain curing surfaces with different surface free energies, and to provide a method of curing an ionizing radiation curing resin composition which can be used as a coating material. Further, it aims to provide a surface modification method which permits surfaces of different surface free energy to be obtained. The above object is achieved by a method of curing a mixture comprising an ionizing radiation curing resin, characterized in that at least part of a mixture comprising 0.01-10 weight parts of a compound (b) having a surface free energy not exceeding 25 mN/m relative to 100 weight parts of an ionizing radiation curing resin composition (a) having a surface free energy of at least 30 mN/m, is cured by irradiating it with ionizing radiation in contact with a medium having a surface free energy higher than that of the ionizing radiation curing resin composition (a).
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: August 26, 2003
    Assignee: Kuraray Co., Ltd.
    Inventors: Atsushi Nagasawa, Takahiro Kitano, Keiji Kubo, Katsuya Fujisawa
  • Publication number: 20030114509
    Abstract: This invention relates to prophylactic or therapeutic drug for diabetic nephropathy or glomerulonephritis, comprising, as an active ingredient, a compound or salt thereof represented by general formula (I) 1
    Type: Application
    Filed: August 26, 2002
    Publication date: June 19, 2003
    Applicant: TAKEDA CHEMICAL INDUSTRIES, LTD.
    Inventors: Kohei Nishikawa, Yumiko Shibouta, Keiji Kubo
  • Publication number: 20020155228
    Abstract: This invention aims to make it possible to obtain curing surfaces with different surface free energies, and to provide a method of curing an ionizing radiation curing resin composition which can be used as a coating material. Further, it aims to provide a surface modification method which permits surfaces of different surface free energy to be obtained. The above object is achieved by a method of curing a mixture comprising an ionizing radiation curing resin, characterized in that at least part of a mixture comprising 0.01-10 weight parts of a compound (b) having a surface free energy not exceeding 25 mN/m relative to 100 weight parts of an ionizing radiation curing resin composition (a) having a surface free energy of at least 30 mN/m, is cured by irradiating it with ionizing radiation in contact with a medium having a surface free energy higher than that of the ionizing radiation curing resin composition (a).
    Type: Application
    Filed: February 19, 2002
    Publication date: October 24, 2002
    Applicant: KURARAY CO., LTD.
    Inventors: Atsushi Nagasawa, Takahiro Kitano, Keiji Kubo, Katsuya Fujisawa
  • Patent number: 6469037
    Abstract: This invention relates to methods for lowering urinary total protein comprising, administering as an active ingredient, a compound or salt thereof represented by general formula (I) wherein R1 stands for H or alkyl; R2 stands for an optionally esterified carboxyl group; R3 stands for a group actually or potentially capable of forming an anion; X shows that the phenylene and phenyl groups bind to each other directly or through a spacer having an atomic chain length of two or less; n stands for 1 or 2; ring A stands for a benzene ring having an optional substituent in addition to R2; Y stands for a bond, —O—, —S(O)m— wherein m stands for 0, 1 or 2, or —N(R4)— wherein R4 stands for H or an optionally substituted alkyl group.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: October 22, 2002
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Kohei Nishikawa, Yumiko Shibouta, Keiji Kubo