Patents by Inventor Shinichiro Shoji

Shinichiro Shoji 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: 11001707
    Abstract: Even when a tin-based polymerization catalyst and a phosphorus-based compound are present in a poly-L-lactic acid (A) and a poly-D-lactic acid (B), by using a specific proportion of an organic acid metal salt or an organic metal salt for stereocomplex crystallization, a stereocomplex polylactic acid composition having a high stereocomplex crystallinity and a high stereocomplex crystal melting point, a small stereocomplex crystal melting point depression even after remelting, a small decrease in the molecular weight, excellent forming processability, and also heat resistance can be provided.
    Type: Grant
    Filed: June 30, 2015
    Date of Patent: May 11, 2021
    Assignee: TEIJIN LIMITED
    Inventors: Suguru Ozawa, Ryuji Nonokawa, Osamu Uemura, Masaya Shibano, Shinichiro Shoji
  • Patent number: 10865272
    Abstract: A thermosetting resin composition which produces no free isocyanate even when a carbodiimide compound is used and provides a cured resin having high heat resistance. The thermosetting resin composition makes it possible to reduce the curing temperature, cures in a short time and provides a cured rein having a high glass transition temperature. The thermosetting resin composition includes: (A) an epoxy resin (component A); and (B) a cyclic carbodiimide compound (component B) including a cyclic structure having one carbodiimide group in which first nitrogen and second nitrogen are bonded together by a bond group and having 8 to 50 atoms forming the cyclic structure and/or (b) a polyvalent amine-based curing agent (component b).
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: December 15, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Shinichiro Shoji, Kouhei Endo, Masaya Shibano
  • Publication number: 20200317913
    Abstract: An object of the present invention is to provide a cyanate ester-based curable resin composition having a high curing rate, very high heat resistance and very high long-term heat resistance, and a molded article and a prepreg each using the same. The present invention relates to a thermosetting resin composition including (A) a cyanate ester compound and/or (B) an unsaturated imide compound, and (C) a cyclic carbodiimide compound. In addition, the present invention relates to a molded article including a cured product of the thermosetting resin composition, and a prepreg including a reinforcing fiber substrate impregnated with the thermosetting resin composition.
    Type: Application
    Filed: December 21, 2018
    Publication date: October 8, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Shinichiro SHOJI, Tomoyoshi YAMAMOTO
  • Patent number: 10577725
    Abstract: Provided is a fiber containing a composition obtained by mixing a compound having at least a ring structure containing one carbodiimide group, the first nitrogen and second nitrogen thereof being linked together through a linking group, with a polymer compound having an acidic group. Also provided is a fiber structure made thereof. A fiber and a fiber structure, which have improved hydrolysis resistance and from which no free isocyanate compounds are produced, can be provided.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: March 3, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Hideshi Kurihara, Kiyotsuna Toyohara, Shinichiro Shoji, Tomoyoshi Yamamoto, Akimichi Oda
  • Publication number: 20190194621
    Abstract: An object of the present invention is to provide a technique for stably, inexpensively, and safely culturing stem cells having a differentiation ability while maintaining an undifferentiated state. The present invention relates to a medium for culturing stem cells, comprising at least one or more compounds selected from the group consisting of a ROCK inhibitor, a PKC inhibitor, a histone methyltransferase inhibitor, and a retinoic acid receptor agonist, and not containing a growth factor or having a low growth factor concentration; a method for culturing stem cells using the medium; a growth promoter for stem cell; as well as a cell composition containing stem cells or differentiated cells therefrom; and a method for producing the cell composition.
    Type: Application
    Filed: September 8, 2017
    Publication date: June 27, 2019
    Applicants: KYOWA HAKKO BIO CO., LTD., KYOWA HAKKO KIRIN CO., LTD.
    Inventors: Kana YAMAGUCHI, Shinichiro SHOJI, Masayoshi TSUKAHARA
  • Publication number: 20190194381
    Abstract: A thermosetting resin composition which produces no free isocyanate even when a carbodiimide compound is used and provides a cured resin having high heat resistance. The thermosetting resin composition makes it possible to reduce the curing temperature, cures in a short time and provides a cured rein having a high glass transition temperature.
    Type: Application
    Filed: March 5, 2019
    Publication date: June 27, 2019
    Applicant: TEIJIN LIMITED
    Inventors: Shinichiro SHOJI, Kouhei Endo, Masaya Shibano
  • Publication number: 20190177686
    Abstract: An object of the present invention is to provide an albumin-free medium for serum-free culture of pluripotent stem cells capable of maintaining the undifferentiated state and the pluripotency (pluripotent ability) of the pluripotent stem cells, an additive for an albumin-free medium, and a culture method. The albumin-free medium for serum-free culture of pluripotent stem cells, the additive for an albumin-free medium, and a medium used for the culture method of the invention are characterized by containing at least one selected from the group consisting of a Pluronic nonionic surfactant, an animal-based hydrolysate, and a nonanimal-based hydrolysate.
    Type: Application
    Filed: May 8, 2017
    Publication date: June 13, 2019
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Miho FURUE, Kana YANAGIHARA, Shinichiro SHOJI, Masayoshi TSUKAHARA
  • Publication number: 20190127707
    Abstract: An object of the present invention is to provide a medium for culturing naive pluripotent stem cells which is for efficiently proliferating naive pluripotent stem cells while maintaining the undifferentiated state and the pluripotency (pluripotent capability) of the naive pluripotent stem cells.
    Type: Application
    Filed: March 30, 2017
    Publication date: May 2, 2019
    Applicant: KYOWA HAKKO BIO CO., LTD.
    Inventors: Miho FURUE, Shinichiro SHOJI, Kana YANAGIHARA, Masayoshi TSUKAHARA
  • Patent number: 9957375
    Abstract: A resin composition including an aromatic polyester resin and having high levels of hydrolysis resistance and moldability is provided. The resin composition includes an aromatic polyester resin having a terminal carboxyl group content of not more than 30 eq/ton (component A), a cyclic carbodiimide compound having at least two carbodiimide rings, each having only one carbodiimide group (component B), and a polyvalent hydroxyl group-containing compound having a hydroxyl value of not less than 200 (component C).
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: May 1, 2018
    Assignees: TEIJIN LIMITED, WINTECH POLYMER LTD.
    Inventors: Ryuji Nonokawa, Shinichiro Shoji, Shinya Yamada, Kouichi Sakata, Kazuya Goshima
  • Publication number: 20170260361
    Abstract: Provided are a resin composition controlled such that after keeping under a severe environment as in high temperature hot water or in hot water under chemically severe condition, such as an acidic or basic condition, etc., for a fixed period of time, it is quickly decomposed; and a structure thereof.
    Type: Application
    Filed: May 24, 2017
    Publication date: September 14, 2017
    Applicant: TEIJIN LIMITED
    Inventors: Shinichiro SHOJI, Masahiro IWAI, Shunsuke KANEMATSU, Yuhei ONO
  • Patent number: 9758496
    Abstract: A method of sealing an end of a polymer with a carbodiimide compound without liberating an isocyanate compound. A compound including a cyclic structure having one carbodiimide group whose first nitrogen and second nitrogen are bonded together by a bond group is used as an end-sealing agent for the polymer.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: September 12, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Shinichiro Shoji, Hirotaka Suzuki
  • Publication number: 20170253693
    Abstract: A thermosetting resin composition which produces no free isocyanate even when a carbodiimide compound is used and provides a cured resin having high heat resistance. The thermosetting resin composition makes it possible to reduce the curing temperature, cures in a short time and provides a cured rein having a high glass transition temperature.
    Type: Application
    Filed: September 9, 2015
    Publication date: September 7, 2017
    Applicant: Teijin Limited
    Inventors: Shinichiro SHOJI, Kouhei ENDO, Masaya SHIBANO
  • Patent number: 9745446
    Abstract: Provided are a resin composition controlled such that after keeping under a severe environment as in high-temperature hot water or in hot water under chemically severe condition, such as an acidic or basic condition, etc., for a fixed period of time, it is quickly decomposed; and a structure thereof.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: August 29, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Shinichiro Shoji, Masahiro Iwai, Shunsuke Kanematsu, Yuhei Ono
  • Patent number: 9650350
    Abstract: A resin composition which comprises polylactic acid, does not release an isocyanate group at the time of production and has excellent hydrolysis resistance and a low environmental burden. The resin composition comprises: (A) 100 parts by weight of a resin component (component A) containing polylactic acid (component A-?); (B) 0.001 to 10 parts by weight of a compound (component B) having one carbodiimide group and a cyclic structure in which first nitrogen and second nitrogen are bonded to each other via a bonding group, the cyclic structure consisting of 8 to 50 atoms; and (C) 0.001 to 2 parts by weight of at least one antioxidant (component C) selected from the group consisting of a hindered phenol-based compound, a phosphite-based compound, a phosphonite-based compound and a thioether-based compound.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: May 16, 2017
    Assignee: TEIJIN LIMITED
    Inventors: Yuichi Matsuno, Masaki Mitsunaga, Jitsuo Oda, Masatsugu Furuki, Shinichiro Shoji, Takuro Kitamura, Yoshitaka Shibata
  • Publication number: 20170130047
    Abstract: Even when a tin-based polymerization catalyst and a phosphorus-based compound are present in a poly-L-lactic acid (A) and a poly-D-lactic acid (B), by using a specific proportion of an organic acid metal salt or an organic metal salt for stereocomplex crystallization, a stereocomplex polylactic acid composition having a high stereocomplex crystallinity and a high stereocomplex crystal melting point, a small stereocomplex crystal melting point depression even after remelting, a small decrease in the molecular weight, excellent forming processability, and also heat resistance can be provided.
    Type: Application
    Filed: June 30, 2015
    Publication date: May 11, 2017
    Applicant: TEIJIN LIMITED
    Inventors: Suguru OZAWA, Ryuji NONOKAWA, Osamu UEMURA, Masaya SHIBANO, Shinichiro SHOJI
  • Publication number: 20160251496
    Abstract: Provided are a resin composition controlled such that after keeping a shape thereof under a severe environment as in high-temperature hot water or in hot water under chemically severe condition, such as an acidic or basic condition, etc., for a fixed period of time, it is quickly decomposed; and a structure thereof.
    Type: Application
    Filed: October 21, 2014
    Publication date: September 1, 2016
    Applicant: TEIJIN LIMITED
    Inventors: Yuhei ONO, Shinichiro SHOJI, Masahiro IWAI, Shunsuke KANEMATSU, Osamu UEMURA, Masaya SHIBANO, Kohei ENDO
  • Patent number: 9428521
    Abstract: A process for the production of a carbodiimide, comprising the steps of: (1) reacting an amine represented by the following formula (A) with carbon disulfide in the presence of a catalyst at a reaction temperature of 50 to 150° C. to obtain a thiourea represented by the following formula (B): (In the above formula (A), R is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.) (In the above formula (B), R is as defined in the above formula (A); (2) desulfurizing the obtained thiourea with a hypochlorite in the presence of a basic compound to obtain a carbodiimide represented by the following formula (C): (In the above formula (C), R is as defined in the above formula (A)); and (3) purifying the obtained carbodiimide.
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: August 30, 2016
    Assignees: KAWAGUCHI CHEMICAL INDUSTRY CO., LTD., TEIJIN LIMITED
    Inventors: Kenji Suzuki, Tsukasa Kato, Tsutomu Yamada, Yuya Kamada, Shinichiro Shoji
  • Patent number: 9346826
    Abstract: A process for producing an intermediate for a cyclic carbodiimide compound includes a process for producing an amine compound represented by the following formula (B), comprising the step of reducing a nitro compound represented by the following formula (A) and containing a compound having a haloarene skeleton in the presence of a metal catalyst and a basic compound. The process also includes a process for producing a thiourea compound, including the step of reacting an amine compound represented by the formula (B) with carbon disulfide in the presence of imidazole. (R is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.) (R is as defined in the above formula (A).).
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: May 24, 2016
    Assignee: TEIJIN LIMITED
    Inventor: Shinichiro Shoji
  • Publication number: 20150376373
    Abstract: Provided are a resin composition controlled such that after keeping under a severe environment as in high-temperature hot water or in hot water under chemically severe condition, such as an acidic or basic condition, etc., for a fixed period of time, it is quickly decomposed; and a structure thereof.
    Type: Application
    Filed: March 20, 2014
    Publication date: December 31, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Shinichiro SHOJI, Masahiro IWAI, Shunsuke KANEMATSU, Yuhei ONO
  • Publication number: 20150105521
    Abstract: A resin composition including a polylactic acid resin, a thermoplastic resin other than a polylactic acid, and a carbodiimide compound having a specific cyclic structure. Provided is a resin composition that exhibits improved compatibility between the polylactic acid resin and the thermoplastic resin other than a polylactic acid.
    Type: Application
    Filed: June 25, 2013
    Publication date: April 16, 2015
    Applicant: TEIJIN LIMITED
    Inventors: Shinichiro Shoji, Ryuji Nonokawa