Patents by Inventor Masahiro KASAMATSU

Masahiro KASAMATSU 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).

  • Aromatic diamine, an intermediate therefor, a method for producing the aromatic diamine, and a method for producing the intermediate therefor
    Patent number: 9981905
    Abstract: An asymmetric diamine suitable for preparing a soluble polyimide and a method for preparing the same, including a compound represented by the following formula (1): wherein R1, R2, R3 and R4 are, independently of each other, a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms, and A and B are, independently of each other, a nitro group or an amino group. Further, a method for preparing the compound represented by the aforesaid formula (1).
    Type: Grant
    Filed: December 14, 2015
    Date of Patent: May 29, 2018
    Assignee: SEIKA CORPORATION
    Inventors: Motonori Takeda, Masahiro Kasamatsu, Akihiro Tamaki
  • 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
  • AROMATIC DIAMINE, AN INTERMEDIATE THEREFOR, A METHOD FOR PRODUCING THE AROMATIC DIAMINE, AND A METHOD FOR PRODUCING THE INTERMEDIATE THEREFOR
    Publication number: 20180072655
    Abstract: An asymmetric diamine suitable for preparing a soluble polyimide and a method for preparing the same, including a compound represented by the following formula (1): wherein R1, R2, R3 and R4 are, independently of each other, a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 3 carbon atoms, and A and B are, independently of each other, a nitro group or an amino group. Further, a method for preparing the compound represented by the aforesaid formula (1).
    Type: Application
    Filed: December 14, 2015
    Publication date: March 15, 2018
    Applicant: SEIKA CORPORATION
    Inventors: Motonori TAKEDA, Masahiro KASAMATSU, Akihiro TAMAKI