Patents by Inventor Shigeru Yamago

Shigeru Yamago 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: 8212013
    Abstract: In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent wherein R2 and R3 are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R2 and R3 are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.
    Type: Grant
    Filed: February 20, 2006
    Date of Patent: July 3, 2012
    Assignee: Otsuka Chemical Co., Ltd.
    Inventor: Shigeru Yamago
  • Patent number: 8076430
    Abstract: An organobismuth compound represented by the formula (1) and a method for preparing a living radical polymer using the organobismuth compound. In the formula (1), R1 to R3 each represent a C1-C8 alkyl group, an aryl group, a substituted aryl group, an aromatic heterocyclic group or a group represented by the formula (2) where at least one of R1 to R3 is a group represented by the formula (2), wherein R4 and R5 each represent a C3-C8 alkyl group, an aryl group or a substituted aryl group, and R6 to R8 each represent a hydrogen atom, a C1-C8 alkyl group, an aryl group or a substituted aryl group.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: December 13, 2011
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Shigeru Yamago, Kunihiko Sugoh, Hikaru Umemoto
  • Publication number: 20110275774
    Abstract: An organoantimony compound represented by the formula (1), processes for producing polymers with use of the compound, and polymers wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, oxycarbonyl or cyano.
    Type: Application
    Filed: July 20, 2011
    Publication date: November 10, 2011
    Inventors: Shigeru YAMAGO, Biswajit Ray, Takashi Kameshima, Kazuhiro Kawano
  • Patent number: 8008414
    Abstract: An organoantimony compound represented by the formula (1), processes for producing polymers with use of the compound, and polymers wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, oxycarbonyl or cyano.
    Type: Grant
    Filed: June 23, 2005
    Date of Patent: August 30, 2011
    Assignees: Otsuka Chemical Co., Ltd., Japan Science and Technology Agency
    Inventors: Shigeru Yamago, Biswajit Ray, Takashi Kameshima, Kazuhiro Kawano
  • Publication number: 20100308273
    Abstract: The present invention provides a terminally modified acrylic polymer having excellent thermal decomposition properties at low temperatures, an inorganic fine particle dispersed paste composition obtained by using the terminally modified acrylic polymer and a method of producing of the terminally modified acrylic polymer.
    Type: Application
    Filed: November 28, 2008
    Publication date: December 9, 2010
    Inventors: Shigeru Yamago, Hiroji Fukui
  • Patent number: 7847043
    Abstract: An organobismuth compound represented by the formula (1) wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, amido, oxycarbonyl or cyano.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: December 7, 2010
    Assignees: Otsuka Chemical Co., Ltd., Japan Science and Technology Agency
    Inventors: Shigeru Yamago, Takashi Kameshima, Kazuhiro Kawano, Osamu Ito, Emiko Daimon, Ken Shu, Kunihiko Sugoh
  • Patent number: 7662899
    Abstract: An organotellurium compound of the formula (1) is useful as a living radical polymerization initiator and makes possible precision control of molecular weights and molecular weight distributions under mild conditions wherein R1 is C1-C8 alkyl, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, aromatic heterocyclic group, hydroxycarbonyl or cyano.
    Type: Grant
    Filed: July 27, 2007
    Date of Patent: February 16, 2010
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20100022728
    Abstract: An organobismuth compound represented by the formula (1) and a method for preparing a living radical polymer using the organobismuth compound. In the formula (1), R1 to R3 each represent a C1-C8 alkyl group, an aryl group, a substituted aryl group, an aromatic heterocyclic group or a group represented by the formula (2) where at least one of R1 to R3 is a group represented by the formula (2), wherein R4 and R5 each represent a C3-C8 alkyl group, an aryl group or a substituted aryl group, and R6 to R8 each represent a hydrogen atom, a C1-C8 alkyl group, an aryl group or a substituted aryl group.
    Type: Application
    Filed: March 6, 2008
    Publication date: January 28, 2010
    Inventors: Shigeru Yamago, Kunihiko Sugoh, Hikaru Umemoto
  • Publication number: 20090299008
    Abstract: An organoantimony compound represented by the formula (1), processes for producing polymers with use of the compound, and polymers wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, oxycarbonyl or cyano.
    Type: Application
    Filed: June 23, 2005
    Publication date: December 3, 2009
    Applicants: OTSUKA CHEMICAL CO., LTD., JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Shigeru Yamago, Biswajit Ray, Takashi Kameshima, Kazuhiro Kawano
  • Patent number: 7615601
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of a living radical polymerization initiator represented by the formula (1) and a compound represented by the formula (2), and the living radical polymer obtained by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano (R1Te)2??(2) wherein R1 is the same as above.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: November 10, 2009
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20080177049
    Abstract: In preparing a glycoside compound from (a) a furanose compound or pyranose compound, and (b) an alcohol compound, a process for preparing a glycoside compound in which glycosidic bond locates selectively trans form relative to C-2 hydroxyl group, the process comprising using a furanose compound wherein the hydroxyl at the 2-position may have a substituent protected with a group A, or a pyranose compound which may have a substituent wherein R2 and R3 are the same or different and are each alkyl having 1 to 4 carbon atoms or aryl having or not having a substituent, or R2 and R3 are combined to form alkylene having 2 to 4 carbon atoms (the alkylene may be substituted with alkyl having 1 to 4 carbon atoms, or may have intervening phenylene), and m and n are each an integer of 0 or 1.
    Type: Application
    Filed: February 20, 2006
    Publication date: July 24, 2008
    Inventor: Shigeru Yamago
  • Publication number: 20080009597
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of a living radical polymerization initiator represented by the formula (1) and a compound represented by the formula (2), and the living radical polymer obtained by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano (R1Te)2??(2) wherein R1 is the same as above.
    Type: Application
    Filed: September 7, 2007
    Publication date: January 10, 2008
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20080004366
    Abstract: An organotellurium compound of the formula (1) is useful as a living radical polymerization initiator and makes possible precision control of molecular weights and molecular weight distributions under mild conditions wherein R1 is C1-C8 alkyl, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, aromatic heterocyclic group, hydroxycarbonyl or cyano.
    Type: Application
    Filed: July 27, 2007
    Publication date: January 3, 2008
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20070265404
    Abstract: An organobismuth compound represented by the formula (1) wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 are each a hydrogen atom or C1-C8 alkyl, and R5 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, amido, oxycarbonyl or cyano.
    Type: Application
    Filed: December 9, 2005
    Publication date: November 15, 2007
    Inventors: Shigeru Yamago, Takashi Kameshima, Kazuhiro Kawano, Osamu Ito, Emiko Daimon, Ken Shu, Kunihiko Sugoh
  • Patent number: 7291690
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of a living radical polymerization initiator represented by the formula (1) and a compound represented by the formula (2), and the living radical polymer obtained by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano (R1Te)2??(2) wherein R1 is the same as above.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: November 6, 2007
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Patent number: 7276569
    Abstract: An organotellurium compound of the formula (1) is useful as a living radical polymerization initiator and makes possible precision control of molecular weights and molecular weight distributions under mild conditions wherein R1 is C1-C8 alkyl, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, aromatic heterocyclic group, hydroxycarbonyl or cyano.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: October 2, 2007
    Assignee: Otsuka Chemical Co., Ltd.
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20060199927
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of an organotellurium compound represented by the formula (1), an azo type polymerization initiator and a ditelluride compound represented by the formula (2), and the living radical polymer obtainable by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano. (R1Te)2 ??(2) wherein R1 is the same as above.
    Type: Application
    Filed: April 26, 2004
    Publication date: September 7, 2006
    Inventors: Shigeru Yamago, Junichi Yoshida, Takashi Kameshima
  • Publication number: 20060167199
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of a living radical polymerization initiator represented by the formula (1) and a compound represented by the formula (2), and the living radical polymer obtained by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano (R1Te)2??(2) wherein R1 is the same as above.
    Type: Application
    Filed: August 8, 2003
    Publication date: July 27, 2006
    Inventors: Shigeru Yamago, Junichi Yoshida
  • Publication number: 20060135711
    Abstract: A process for producing a living radical polymer characterized in that a vinyl monomer is polymerized with use of an organotellurium compound represented by the formula (1) and an azo type polymerization initiator, and the living radical polymer obtainable by the process wherein R1 is C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, an aromatic heterocyclic group, acyl, oxycarbonyl or cyano.
    Type: Application
    Filed: February 17, 2004
    Publication date: June 22, 2006
    Inventors: Shigeru Yamago, Junichi Yoshida, Takashi Kameshima
  • Publication number: 20050245714
    Abstract: An organotellurium compound of the formula (1) is useful as a living radical polymerization initiator and makes possible precision control of molecular weights and molecular weight distributions under mild conditions wherein R1 is C1-C8 alkyl, R2 and R3 are each a hydrogen atom or C1-C8 alkyl, and R4 is aryl, substituted aryl, aromatic heterocyclic group, hydroxycarbonyl or cyano.
    Type: Application
    Filed: August 6, 2002
    Publication date: November 3, 2005
    Applicant: OTSUKA CHEMICAL CO., LTD.
    Inventors: Shigeru Yamago, Junichi Yoshida