Patents by Inventor Kensuke Hiroshige

Kensuke Hiroshige 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).

  • Method for producing aqueous polyimide precursor solution composition
    Patent number: 11407868
    Abstract: A method for producing an aqueous polyimide precursor solution includes forming a polyamic acid by the reaction of a tetracarboxylic acid component and a diamine component in water without organic solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: August 9, 2022
    Assignee: Ube Industries, Ltd.
    Inventors: Takeshige Nakayama, Susumu Takasaki, Tomonori Nakayama, Kensuke Hiroshige
  • Method for producing aqueous polyimide precursor solution composition
    Patent number: 11407857
    Abstract: A method for producing an aqueous polyimide precursor solution composition includes forming a polyamic acid by the reaction of a tetracarboxylic acid component and a diamine component in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: August 9, 2022
    Assignee: Ube Industries, Ltd.
    Inventors: Takeshige Nakayama, Susumu Takasaki, Tomonori Nakayama, Kensuke Hiroshige
  • METHOD FOR PRODUCING AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION
    Publication number: 20200247969
    Abstract: A method for producing an aqueous polyimide precursor solution includes forming a polyamic acid by the reaction of a tetracarboxylic acid component and a diamine component in water without organic solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Application
    Filed: March 27, 2020
    Publication date: August 6, 2020
    Inventors: Takeshige NAKAYAMA, Susumu TAKASAKI, Tomonori NAKAYAMA, Kensuke HIROSHIGE
  • METHOD FOR PRODUCING AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION
    Publication number: 20200224054
    Abstract: A method for producing an aqueous polyimide precursor solution composition includes forming a polyamic acid by the reaction of a tetracarboxylic acid component and a diamine component in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Application
    Filed: March 27, 2020
    Publication date: July 16, 2020
    Inventors: Takeshige NAKAYAMA, Susumu TAKASAKI, Tomonori NAKAYAMA, Kensuke HIROSHIGE
  • AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION AND METHOD FOR PRODUCING AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION
    Publication number: 20170073545
    Abstract: An aqueous polyimide precursor solution composition in which a polyamic acid which is formed by the reaction of a tetracarboxylic acid component and a diamine component, and contains a repeating unit represented by the following formula (1), is dissolved in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid, in which the aqueous polyimide precursor solution composition contains no organic solvent, and the polyamic acid has an inherent viscosity of 0.2 or more.
    Type: Application
    Filed: November 3, 2016
    Publication date: March 16, 2017
    Inventors: Takeshige Nakayama, Susumu Takasaki, Tomonori Nakayama, Kensuke Hiroshige
  • AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION AND METHOD FOR PRODUCING AQUEOUS POLYIMIDE PRECURSOR SOLUTION
    Publication number: 20140363687
    Abstract: An aqueous polyimide precursor solution composition in which a polyamic acid which is obtained by reacting a tetracarboxylic acid component and a diamine component is dissolved in an aqueous solvent together with an imidazole in an amount of 1.6 moles or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Application
    Filed: January 10, 2013
    Publication date: December 11, 2014
    Inventors: Takeshige Nakayama, Susumu Takasaki, Tomonori Nakayama, Kensuke Hiroshige
  • AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION AND METHOD FOR PRODUCING AQUEOUS POLYIMIDE PRECURSOR SOLUTION COMPOSITION
    Publication number: 20140218875
    Abstract: An aqueous polyimide precursor solution composition, in which a polyamic acid, which is formed by the reaction of a tetracarboxylic acid component and a diamine component, is dissolved in an aqueous solvent together with an imidazole in an amount of 1.6 mole or more per mole of the tetracarboxylic acid component of the polyamic acid.
    Type: Application
    Filed: September 6, 2012
    Publication date: August 7, 2014
    Applicant: C/O UBE INDUSTRIES, LTD.
    Inventors: Takeshige Nakayama, Susumu Takasaki, Tomonori Nakayama, Kensuke Hiroshige
  • POLYIMIDE SEAMLESS BELT AND PROCESS FOR PRODUCTION THEREOF, AND POLYIMIDE PRECURSOR SOLUTION COMPOSITION
    Publication number: 20130327982
    Abstract: A seamless belt formed of a polyimide including a repeating unit represented by the formula (1): in which 25 mol % to 95 mol % of A is a tetravalent unit represented by the formula (2): 75 mol % to 5 mol % of A is a tetravalent unit represented by the formula (3): 15 mol % to 95 mol % of B is a divalent unit represented by the formula (4): and 85 mol % to 5 mol % of B is a divalent unit represented by the formula (5):
    Type: Application
    Filed: December 14, 2011
    Publication date: December 12, 2013
    Applicant: UBE INDUSTRIES, LTD.
    Inventors: Takeshige Nakayama, Tomonori Nakayama, Akira Kawabata, Susumu Takasaki, Kensuke Hiroshige