Patents by Inventor Yoshikatsu Watanabe

Yoshikatsu Watanabe 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: 11811069
    Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
    Type: Grant
    Filed: April 21, 2022
    Date of Patent: November 7, 2023
    Assignee: FDK CORPORATION
    Inventors: Minori Inoue, Takeshi Kajiwara, Shohei Unoki, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20230049091
    Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air secondary battery, and this catalyst for an air secondary battery includes a pyrochlore bismuth-ruthenium composite oxide having a full width at half maximum of a diffraction peak corresponding to a (222) face obtained by a powder X-ray diffraction method using CuK? rays as X-rays, of 0.350 deg or larger and 0.713 deg or smaller.
    Type: Application
    Filed: July 19, 2022
    Publication date: February 16, 2023
    Inventors: Shohei Unoki, Takeshi Kajiwara, Minori Inoue, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20220359884
    Abstract: A battery includes: an electrode group including an air electrode and a negative electrode that are stacked with a separator interposed therebetween; and a container housing the electrode group together with an alkaline electrolyte liquid. The air electrode includes a catalyst for an air electrode. This catalyst for an air electrode is a catalyst for an air electrode including an oxide containing at least bismuth (Bi), ruthenium (Ru), sodium (Na), and oxygen, and Na/(Ru+Bi+Na) representing an atomic ratio of the sodium to a sum of the bismuth, the ruthenium, and the sodium is 0.126 or more and 0.145 or less.
    Type: Application
    Filed: April 21, 2022
    Publication date: November 10, 2022
    Inventors: Minori Inoue, Takeshi Kajiwara, Shohei Unoki, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11495804
    Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
    Type: Grant
    Filed: February 4, 2020
    Date of Patent: November 8, 2022
    Assignees: FDK CORPORATION, JAPAN METALS AND CHEMICALS CO., LTD.
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 11322751
    Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
    Type: Grant
    Filed: March 25, 2019
    Date of Patent: May 3, 2022
    Assignee: FDK CORPORATION
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20210043945
    Abstract: A battery includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and an accommodating bag accommodating the electrode group along with an alkali electrolyte solution. The air electrode includes a catalyst for an air secondary battery. This catalyst for an air secondary battery is produced by a method for producing a catalyst for an air secondary battery, the method including a precursor preparation step of preparing a bismuth-ruthenium oxide precursor, a calcination step of calcining the bismuth-ruthenium oxide precursor obtained in this precursor preparation step to form a bismuth-ruthenium oxide, and a nitric acid treatment step of immersing the bismuth-ruthenium oxide obtained by this calcination step in a nitric acid aqueous solution.
    Type: Application
    Filed: March 25, 2019
    Publication date: February 11, 2021
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Publication number: 20200251746
    Abstract: An air electrode catalyst for an air secondary battery includes a pyrochlore-type composite oxide having two or more crystal structures having a different amount of oxygen. A battery, according to some embodiments, includes an electrode group including an air electrode and a negative electrode stacked with a separator therebetween, and a container accommodating the electrode group along with an alkali electrolyte solution, wherein the air electrode includes the air electrode catalyst. The air electrode catalyst may have a pyrochlore-type composite oxide having a crystal structure represented by Bi2Ru2O6.92 and a crystal structure represented by Bi2Ru2O7.33.
    Type: Application
    Filed: February 4, 2020
    Publication date: August 6, 2020
    Inventors: Shohei Unoki, Takeshi Kajiwara, Takahiro Endo, Shigekazu Yasuoka, Yoshikatsu Watanabe
  • Patent number: 5434926
    Abstract: An automatic volume control to prevent the listener from having an odd sensation is obtained with a plurality of conditions taken into considerations. A plurality of control rules required to infer using fuzzy logic a volume correcting value on the basis of frequency band component levels, L, M and H and a volume level V are stored beforehand in a volume correcting value inferring portion 13. The volume correcting value inferring portion 13 obtains inference results of the individual control rules on the basis of the individual frequency band component levels L, M, H input from a filter circuit 12 and the volume level input from an audio reproducing portion 14, obtains a weighted mean of the respective inference results as a volume correcting value Z, and inputs the volume correcting value to the audio reproducing portion 14 to automatically correct the volume.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: July 18, 1995
    Assignee: Alpine Electronics Inc.
    Inventors: Yoshikatsu Watanabe, Takashi Miyake, Masatoshi Ito, Yoshio Imanishi
  • Patent number: 5204971
    Abstract: A sound system for a vehicle detects the amount of noise, such as road noise, and automatically controls the audio volume in accordance with the noise amount. There are provided a plurality of tables, in which the relationships among the present volume, the noise amount and the volume increase amount of the audio signal are stored. Once one of the plurality of tables is selected by using a table selection key according to the type of the vehicle or the sound system, the volume is automatically controlled based on the characteristic of the selected table.
    Type: Grant
    Filed: September 26, 1991
    Date of Patent: April 20, 1993
    Assignee: Alpine Electronics, Inc.
    Inventors: Masahiro Takahashi, Yoshikatsu Watanabe