Patents by Inventor Takako ARAI

Takako ARAI 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).

  • Carbon black for batteries, coating liquid for batteries, positive electrode for nonaqueous batteries and nonaqueous battery
    Patent number: 11658278
    Abstract: To provide a carbon black for batteries capable of readily obtaining a positive electrode for batteries having excellent adhesiveness, and excellent output characteristics and the cycle characteristics. A carbon black for batteries, the carbon black having a BET specific surface area measured according to JIS K6217-2 C method of 100 m2/g or larger, and a surface fluorine concentration X (unit: atom %) and a surface oxygen concentration Y (unit: atom %) measured by X-ray Photoelectron Spectroscopy (XPS) satisfying the following conditions (A) and (B), 0.3?X?4.0 and??(A) 0.1?Y?3.0.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: May 23, 2023
    Assignees: DENKA COMPANY LIMITED, CENTRAL GLASS COMPANY, LIMITED
    Inventors: Shinichiro Osumi, Tatsuya Nagai, Takako Arai, Tetsuya Ito, Hiroyuki Oomori, Shoi Suzuki, Akifumi Yao
  • CARBON BLACK FOR BATTERIES, COATING LIQUID FOR BATTERIES, POSITIVE ELECTRODE FOR NONAQUEOUS BATTERIES AND NONAQUEOUS BATTERY
    Publication number: 20200227721
    Abstract: To provide a carbon black for batteries capable of readily obtaining a positive electrode for batteries having excellent adhesiveness, and excellent output characteristics and the cycle characteristics. A carbon black for batteries, the carbon black having a BET specific surface area measured according to JIS K6217-2 C method of 100 m2/g or larger, and a surface fluorine concentration X (unit: atom %) and a surface oxygen concentration Y (unit: atom %) measured by X-ray Photoelectron Spectroscopy (XPS) satisfying the following conditions (A) and (B), 0.3?X?4.0 and??(A) 0.1?Y?3.0.
    Type: Application
    Filed: March 18, 2020
    Publication date: July 16, 2020
    Inventors: Shinichiro OSUMI, Tatsuya NAGAI, Takako ARAI, Tetsuya ITO, Hiroyuki OOMORI, Shoi SUZUKI, Akifumi YAO