Patents by Inventor Hajime Kunita

Hajime Kunita 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).

  • Piezoelectric material filler, composite piezoelectric material, composite piezoelectric device, composite piezoelectric material filler, and method for producing alkali niobate compound
    Patent number: 11659768
    Abstract: Provided is a piezoelectric material filler including alkali niobate compound particles having a ratio (K/(Na+K)) of the number of moles of potassium to the total number of moles of sodium and potassium of 0.460 to 0.495 in terms of atoms and a ratio ((Li+Na+K)/Nb) of the total number of moles of alkali metal elements to the number of moles of niobium of 0.995 to 1.005 in terms of atoms. The present invention can provide a piezoelectric material filler having excellent piezoelectric properties, and a composite piezoelectric material including the piezoelectric material filler and a polymer matrix.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: May 23, 2023
    Assignee: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: Shinji Tanabe, Hajime Kunita, Shunsuke Kikuchi
  • PIEZOELECTRIC MATERIAL FILLER, COMPOSITE PIEZOELECTRIC MATERIAL, COMPOSITE PIEZOELECTRIC DEVICE, COMPOSITE PIEZOELECTRIC MATERIAL FILLER, AND METHOD FOR PRODUCING ALKALI NIOBATE COMPOUND
    Publication number: 20220093845
    Abstract: Provided is a piezoelectric material filler including alkali niobate compound particles having a ratio (K/(Na+K)) of the number of moles of potassium to the total number of moles of sodium and potassium of 0.460 to 0.495 in terms of atoms and a ratio ((Li+Na+K)/Nb) of the total number of moles of alkali metal elements to the number of moles of niobium of 0.995 to 1.005 in terms of atoms. The present invention can provide a piezoelectric material filler having excellent piezoelectric properties, and a composite piezoelectric material including the piezoelectric material filler and a polymer matrix.
    Type: Application
    Filed: December 6, 2021
    Publication date: March 24, 2022
    Applicant: Nippon Chemical Industrial Co., Ltd.
    Inventors: Shinji Tanabe, Hajime Kunita, Shunsuke Kikuchi
  • Piezoelectric material filler, composite piezoelectric material, composite piezoelectric device, composite piezoelectric material filler, and method for producing alkali niobate compound
    Patent number: 11239409
    Abstract: Provided is a piezoelectric material filler including alkali niobate compound particles having a ratio (K/(Na+K)) of the number of moles of potassium to the total number of moles of sodium and potassium of 0.460 to 0.495 in terms of atoms and a ratio ((Li+Na+K)/Nb) of the total number of moles of alkali metal elements to the number of moles of niobium of 0.995 to 1.005 in terms of atoms. The present invention can provide a piezoelectric material filler having excellent piezoelectric properties, and a composite piezoelectric material including the piezoelectric material filler and a polymer matrix.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: February 1, 2022
    Assignee: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
    Inventors: Shinji Tanabe, Hajime Kunita, Shunsuke Kikuchi
  • PIEZOELECTRIC MATERIAL FILLER, COMPOSITE PIEZOELECTRIC MATERIAL, COMPOSITE PIEZOELECTRIC DEVICE, COMPOSITE PIEZOELECTRIC MATERIAL FILLER, AND METHOD FOR PRODUCING ALKALI NIOBATE COMPOUND
    Publication number: 20190181330
    Abstract: Provided is a piezoelectric material filler including alkali niobate compound particles having a ratio (K/(Na+K)) of the number of moles of potassium to the total number of moles of sodium and potassium of 0.460 to 0.495 in terms of atoms and a ratio ((Li+Na+K)/Nb) of the total number of moles of alkali metal elements to the number of moles of niobium of 0.995 to 1.005 in terms of atoms. The present invention can provide a piezoelectric material filler having excellent piezoelectric properties, and a composite piezoelectric material including the piezoelectric material filler and a polymer matrix.
    Type: Application
    Filed: June 19, 2017
    Publication date: June 13, 2019
    Applicants: Nippon Chemical Industrial Co., Ltd., Nippon Chemical Industrial Co., Ltd.
    Inventors: Shinji Tanabe, Hajime Kunita, Shunsuke Kikuchi