Patents by Inventor Hirokazu KUMAZAWA

Hirokazu KUMAZAWA 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: 11498876
    Abstract: The present disclosure provides a ceramic powder having low bulkiness and good dispersibility. In the ceramic powder, the volume ratio of aggregated particles having a particle diameter larger than a reference particle diameter is 35 vol. % or more and the volume ratio when ultrasonic dispersion treatment for 10 minutes at an oscillation frequency of 19.5 kHz and an output power of 10 W is applied is 4 vol. % or less. The reference particle diameter is a particle diameter equivalent to a cumulative 0.1 vol. % diameter from the large diameter side when the ceramic powder is subjected to ultrasonic dispersion treatment for 3 minutes at an oscillation frequency of 19.5 kHz and an output power of 150 W.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: November 15, 2022
    Assignee: FUJIMI INCORPORATED
    Inventors: Naoki Ushida, Yuji Masuda, Hirokazu Kumazawa, Mina Sato
  • Publication number: 20210094884
    Abstract: To provide a ceramic powder having low bulkiness and good dispersibility. In the ceramic powder, the volume ratio of aggregated particles having a particle diameter larger than a reference particle diameter is 35 vol. % or more and the volume ratio when ultrasonic dispersion treatment for 10 minutes at an oscillation frequency of 19.5 kHz and an output power of 10 W is applied is 4 vol. % or less. The reference particle diameter is a particle diameter equivalent to a cumulative 0.1 vol. % diameter from the large diameter side when the ceramic powder is subjected to ultrasonic dispersion treatment for 3 minutes at an oscillation frequency of 19.5 kHz and an output power of 150 W.
    Type: Application
    Filed: September 29, 2020
    Publication date: April 1, 2021
    Applicant: FUJIMI INCORPORATED
    Inventors: Naoki USHIDA, Yuji MASUDA, Hirokazu KUMAZAWA, Mina SATO