Patents by Inventor Naofumi KOZAI

Naofumi KOZAI 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).

  • 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
  • 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