Patents by Inventor Yuka NIIMI

Yuka NIIMI 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: 11183340
    Abstract: A method of producing a solid electrolytic capacitor, including a step of forming a dielectric film on the surface of a valve-acting metal having fine pores and a step of forming a solid electrolyte layer containing a conductive polymer on the dielectric film; wherein the solid electrolyte layer containing the conductive polymer is formed without using an oxidizing agent by: (i) a method of polymerizing at least one of the compounds (A1) represented by formula (1) disclosed herein in the presence of a compound (B) having a sulfo group; (ii) a method of copolymerizing at least one compound (A2) represented by formula (2) disclosed herein; and (iii) a method of polymerizing at least one of the compounds (A1) and (A2).
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: November 23, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi, Toshiya Kawasaki, Yoshinori Shibuya, Takeshi Kohama
  • Patent number: 11136432
    Abstract: The present invention relates to (i) a method of producing a conductive polymer, comprising polymerizing at least one of compounds (A1) represented by the formula (1) disclosed in the specification in the presence of a compound (B) having sulfo group; (ii) a method of producing a conductive polymer, comprising polymerizing at least one compound selected from a group consisting of at least one compound (A2) represented by the formula (2); and (iii) a method of producing a conductive polymer, comprising copolymerizing at least one compound (A1) and at least one compound selected from a group consisting of at least one compound (A2). The method of the present invention is a method for producing a one-liquid type conductive polymer in which it is possible to easily adjust the solvent affinity, the solubility, and other such aspects of performance according to the purpose.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: October 5, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi
  • Patent number: 11104659
    Abstract: The present invention relates to a fused heteropolycyclic compound represented by formulae (1) and (2), a method for producing the same, and a method for producing a conductive polymer represented by formulae (3) and (4) in which at least one compound represented by formula (2) is used (the symbols in the formulae are as described in the description). The method of the present invention is a method for producing a sulfo-group-containing polyisothianaphthene capable of reducing the use amount of an oxidant or capable of being polymerized without the use of any oxidant.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: August 31, 2021
    Assignee: SHOWA DENKO K.K.
    Inventors: Takeshi Kawamoto, Yuka Niimi
  • Publication number: 20200090874
    Abstract: A method of producing a solid electrolytic capacitor, including a step of forming a dielectric film on the surface of a valve-acting metal having fine pores and a step of forming a solid electrolyte layer containing a conductive polymer on the dielectric film; wherein the solid electrolyte layer containing the conductive polymer is formed without using an oxidizing agent by: (i) a method of polymerizing at least one of the compounds (A1) represented by formula (1) disclosed herein in the presence of a compound (B) having a sulfo group; (ii) a method of copolymerizing at least one compound (A2) represented by formula (2) disclosed herein; and (iii) a method of polymerizing at least one of the compounds (A1) and (A2).
    Type: Application
    Filed: September 29, 2017
    Publication date: March 19, 2020
    Applicant: SHOWA DENKO K.K.
    Inventors: Takeshi KAWAMOTO, Yuka NIIMI, Toshiya KAWASAKI, Yoshinori SHIBUYA, Takeshi KOHAMA
  • Publication number: 20190345287
    Abstract: The present invention relates to (i) a method of producing a conductive polymer, comprising polymerizing at least one of compounds (A1) represented by the formula (1) disclosed in the specification in the presence of a compound (B) having sulfo group; (ii) a method of producing a conductive polymer, comprising polymerizing at least one compound selected from a group consisting of at least one compound (A2) represented by the formula (2); and (iii) a method of producing a conductive polymer, comprising copolymerizing at least one compound (A1) and at least one compound selected from a group consisting of at least one compound (A2). The method of the present invention is a method for producing a one-liquid type conductive polymer in which it is possible to easily adjust the solvent affinity, the solubility, and other such aspects of performance according to the purpose.
    Type: Application
    Filed: September 29, 2017
    Publication date: November 14, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Takeshi KAWAMOTO, Yuka NIIMI
  • Publication number: 20190337919
    Abstract: The present invention relates to a fused heteropolycyclic compound represented by formulae (1) and (2), a method for producing the same, and a method for producing a conductive polymer represented by formulae (3) and (4) in which at least one compound represented by formula (2) is used (the symbols in the formulae are as described in the description). The method of the present invention is a method for producing a sulfo-group-containing polyisothianaphthene capable of reducing the use amount of an oxidant or capable of being polymerized without the use of any oxidant.
    Type: Application
    Filed: September 29, 2017
    Publication date: November 7, 2019
    Applicant: SHOWA DENKO K.K.
    Inventors: Takeshi KAWAMOTO, Yuka NIIMI