Patents by Inventor Mitsutaka IMOTO

Mitsutaka IMOTO 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).

  • META-ESTER AROMATIC DIAMINES, METHOD FOR PRODUCING SAME, AND POLYIMIDE HAVING SAID META-ESTER AROMATIC DIAMINES AS RAW MATERIAL
    Publication number: 20240383844
    Abstract: [Problems] The purposes of the present invention are to provide a novel meta-type ester-containing aromatic diamines, a method for preparing the same, and a polyimide synthesis. [Solution] The present invention provides a compound represented by the following formula (1) and a method for preparing the same: In the formula (1), X is selected from the following structures (a), (b) and (c), wherein R1, R2, R3, and R4 in the formula (1) and R5, R6, R7, R8, R9 and R10 in (a), (b) and (c) are, independently of each other, a hydrogen atom, an optionally substituted alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms, provided that at least one of R7, R8, R9 and R10 is the alkyl group or the alkoxy group.
    Type: Application
    Filed: May 31, 2024
    Publication date: November 21, 2024
    Inventors: Mitsutaka Imoto, Yasuyuki Miyata, Motonori Takeda, Kazuhide Nishiyama, Hitoshi Yamato
  • META-ESTER AROMATIC DIAMINES, METHOD FOR PRODUCING SAME, AND POLYIMIDE HAVING SAID META-ESTER AROMATIC DIAMINES AS RAW MATERIAL
    Publication number: 20240239741
    Abstract: [Problems] The purposes of the present invention are to provide a novel meta-type ester-containing aromatic diamines, a method for preparing the same, and a polyimide synthesis. [Solution] The present invention provides a compound represented by the following formula (1) and a method for preparing the same: In the formula (1), X is selected from the following structures (a), (b) and (c), wherein R1, R2, R3, and R4 in the formula (1) and R5, R6, R7, R8, R9 and R10 in (a), (b) and (c) are, independently of each other, a hydrogen atom, an optionally substituted alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms, provided that at least one of R7, R8, R9 and R10 is the alkyl group or the alkoxy group.
    Type: Application
    Filed: March 25, 2022
    Publication date: July 18, 2024
    Inventors: Mitsutaka Imoto, Yasuyuki Miyata, Motonori Takeda, Kazuhide Nishiyama, Hitoshi Yamato
  • Aromatic diamine, an intermediate therefor, a method for producing the aromatic diamine, and a method for producing the intermediate therefor
    Patent number: 9957241
    Abstract: A novel asymmetric diamine, diamino-2-(benzothiazole-2-yl)diphenyl ether, derivatives therefor, and an intermediate for the compound such as aminonitro-2-(benzothiazole-2-yl)diphenyl ether, dinitro-2-(benzothiazole-2-yl)diphenyl ether, and derivatives from these. Additionally, another novel asymmetric diamine, diamino-2-(benzoxazole-2-yl)diphenyl ether, derivatives therefor, and intermediate for the compound such as aminonitro-2-(benzoxazole-2-yl)diphenyl ether, dinitro-2-(benzoxazole-2-yl)diphenyl ether, and derivatives from these, and methods for preparing them.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: May 1, 2018
    Assignee: SEIKA CORPORATION
    Inventors: Motonori Takeda, Masahiro Kasamatsu, Akihiro Tamaki, Seiichi Mori, Mitsutaka Imoto, Yoshihisa Takeda
  • AROMATIC DIAMINE, AN INTERMEDIATE THEREFOR, A METHOD FOR PRODUCING THE AROMATIC DIAMINE, AND A METHOD FOR PRODUCING THE INTERMEDIATE THEREFOR
    Publication number: 20180079732
    Abstract: A novel asymmetric diamine, diamino-2-(benzothiazole-2-yl)diphenyl ether, derivatives therefor, and an intermediate for the compound such as aminonitro-2-(benzothiazole-2-yl)diphenyl ether, dinitro-2-(benzothiazole-2-yl)diphenyl ether, and derivatives from these. Additionally, another novel asymmetric diamine, diamino-2-(benzoxazole-2-yl)diphenyl ether, derivatives therefor, and intermediate for the compound such as aminonitro-2-(benzoxazole-2-yl)diphenyl ether, dinitro-2-(benzoxazole-2-yl)diphenyl ether, and derivatives from these, and methods for preparing them.
    Type: Application
    Filed: March 29, 2016
    Publication date: March 22, 2018
    Applicant: SEIKA CORPORATION
    Inventors: Motonori TAKEDA, Masahiro KASAMATSU, Akihiro TAMAKI, Seiichi MORI, Mitsutaka IMOTO, Yoshihisa TAKEDA