Patents by Inventor Takuya NANKAWA

Takuya NANKAWA 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).

  • Gels, Porous Bodies, and Method of Preparing a Gel or a Porous Body
    Publication number: 20230235146
    Abstract: [PROBLEMS] To easily provide gels and porous bodies having high strength. [SOLVING MEANS] A method of producing a porous body according to the present invention is characterized by having a first step of dissolving fibrous polymers each having a reactive functional group in a solution, a second step of freezing the solution in which the fibrous polymers are dissolved, and a third step of cross-linking fibrous polymers to each other by adding a predetermined amount of cross-linking agent to the frozen solution.
    Type: Application
    Filed: March 19, 2021
    Publication date: July 27, 2023
    Inventors: Yurina SEKINE, Takuya NANKAWA
  • Process for producing carbonate apatite
    Patent number: 11649166
    Abstract: An efficient method of producing a carbonate apatite is provided. The method comprises: a first step of calcining animal bone; and a second step of reacting a bone calcined product obtained in the first step with a basic carbonate compound.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: May 16, 2023
    Assignee: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Yurina Sekine, Takuya Nankawa, Naofumi Kozai
  • Carbonate apatite with high carbonate content
    Patent number: 11577216
    Abstract: A carbonate apatite highly containing carbonate groups, having excellent heavy metal adsorption capacity is provided. The carbonate apatite contains not less than 15.6% by weight carbonate groups, preferably contains at least one of copper (Cu), zinc (Zn), strontium (Sr), magnesium (Mg), potassium (K), iron (Fe), and sodium (Na), and preferably has a Ca/P molar ratio of not less than 1.5.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: February 14, 2023
    Assignee: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Yurina Sekine, Takuya Nankawa, Naofumi Kozai
  • Compound, synthesis method thereof, and separation and recovery agent thereof
    Patent number: 11406929
    Abstract: To provide a new compound with pores finely tunable in size so as to take up a specific element and release the specific element taken up in the pores as necessary, a synthesis method of the new compound, and a separation and recovery agent. The new compound represented by the following molecular formula: (NH4)[Ln(C2O4)2(H2O)] wherein Ln represents a lanthanide selected from Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: August 9, 2022
    Assignee: Japan Atomic Energy Agency
    Inventors: Takuya Nankawa, Matthew Rosseinsky, David Stewart, Alexandros Katsoulidis
  • Compound, Synthesis Method Thereof, and Separation and Recovery Agent Thereof
    Publication number: 20220008862
    Abstract: To provide a new compound with pores finely tunable in size so as to take up a specific element and release the specific element taken up in the pores as necessary, a synthesis method of the new compound, and a separation and recovery agent. The new compound represented by the following molecular formula: (NH4)[Ln(C2O4)2(H2O)] wherein Ln represents a lanthanide selected from Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
    Type: Application
    Filed: September 23, 2021
    Publication date: January 13, 2022
    Inventors: Takuya NANKAWA, Matthew ROSSEINSKY, David STEWART, Alexandros KATSOULIDIS
  • CARBONATE APATITE WITH HIGH CARBONATE CONTENT
    Publication number: 20200215513
    Abstract: A carbonate apatite highly containing carbonate groups, having excellent heavy metal adsorption capacity is provided. The carbonate apatite contains not less than 15.6% by weight carbonate groups, preferably contains at least one of copper (Cu), zinc (Zn), strontium (Sr), magnesium (Mg), potassium (K), iron (Fe), and sodium (Na), and preferably has a Ca/P molar ratio of not less than 1.5.
    Type: Application
    Filed: December 31, 2019
    Publication date: July 9, 2020
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Yurina SEKINE, Takuya NANKAWA, Naofumi KOZAI
  • PROCESS FOR PRODUCING CARBONATE APATITE
    Publication number: 20200216318
    Abstract: An efficient method of producing a carbonate apatite is provided. The method comprises: a first step of calcining animal bone; and a second step of reacting a bone calcined product obtained in the first step with a basic carbonate compound.
    Type: Application
    Filed: January 2, 2020
    Publication date: July 9, 2020
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventors: Yurina SEKINE, Takuya NANKAWA, Naofumi KOZAI
  • Compound, Synthesis Method Thereof, and Separation and Recovery Agent Thereof
    Publication number: 20180050920
    Abstract: To provide a new compound with pores finely tunable in size so as to take up a specific element and release the specific element taken up in the pores as necessary, a synthesis method of the new compound, and a separation and recovery agent. The new compound represented by the following molecular formula: (NH4)[Ln(C2O4)2(H2O)] wherein Ln represents a lanthanide selected from Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
    Type: Application
    Filed: August 18, 2017
    Publication date: February 22, 2018
    Inventors: Takuya NANKAWA, Matthew ROSSEINSKY, David STEWART, Alexandros KATSOULIDIS