Patents by Inventor Katsura ISHIKAWA

Katsura ISHIKAWA 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).

  • Publication number: 20230255857
    Abstract: To provide a dental composition wherein the acid buffering capacity can be attained and the acid resistance of the tooth substance can be improved while maintaining very high foul breath inhibition capacity. A dental composition including: ion sustained-release glass; and a carrier for supporting the ion sustained-release glass, wherein the ion sustained-release glass is fluoroaluminoborosilicate glass having a composition range of: 15% to 35% by mass SiO2; 15% to 30% by mass Al2O3; 5% to 20% by mass B2O3; 20% to 45% by mass SrO; 5% to 15% by mass F; and 0% to 10% by mass Na2O.
    Type: Application
    Filed: April 4, 2023
    Publication date: August 17, 2023
    Applicant: SHOFU INC.
    Inventors: Daisuke HARA, Yuji SADAKANE, Katsura ISHIKAWA, Hidefumi FUJIMURA, Shuji SAKAMOTO, Akihiro NAGAFUJI, Toshiyuki NAKATSUKA
  • Patent number: 11648184
    Abstract: To provide a dental composition wherein the acid buffering capacity can be attained and the acid resistance of the tooth substance can be improved while maintaining very high foul breath inhibition capacity. A dental composition including: ion sustained-release glass; and a carrier for supporting the ion sustained-release glass, wherein the ion sustained-release glass is fluoroaluminoborosilicate glass having a composition range of: 15% to 35% by mass SiO2; 15% to 30% by mass Al2O3; 5% to 20% by mass B2O3; 20% to 45% by mass SrO; 5% to 15% by mass F; and 0% to 10% by mass Na2O.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: May 16, 2023
    Assignee: SHOFU INC.
    Inventors: Daisuke Hara, Yuji Sadakane, Katsura Ishikawa, Hidefumi Fujimura, Shuji Sakamoto, Akihiro Nagafuji, Toshiyuki Nakatsuka
  • Patent number: 11559471
    Abstract: To provide a dental composition wherein the acid buffering capacity can be attained and the acid resistance of the tooth substance can be improved while maintaining very high foul breath inhibition capacity. A dental composition including: ion sustained-release glass; and a carrier for supporting the ion sustained-release glass, wherein the ion sustained-release glass is fluoroaluminoborosilicate glass having a composition range of: 15% to 35% by mass SiO2; 15% to 30% by mass Al2O3; 5% to 20% by mass B2O3; 20% to 45% by mass SrO; 5% to 15% by mass F; and 0% to 10% by mass Na2O.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: January 24, 2023
    Assignee: SHOFU INC.
    Inventors: Daisuke Hara, Yuji Sadakane, Katsura Ishikawa, Hidefumi Fujimura, Shuji Sakamoto, Akihiro Nagafuji, Toshiyuki Nakatsuka
  • Publication number: 20180344579
    Abstract: To provide a dental composition wherein the acid buffering capacity can be attained and the acid resistance of the tooth substance can be improved while maintaining very high foul breath inhibition capacity. A dental composition including: ion sustained-release glass; and a carrier for supporting the ion sustained-release glass, wherein the ion sustained-release glass is fluoroaluminoborosilicate glass having a composition range of: 15% to 35% by mass SiO2; 15% to 30% by mass Al2O3; 5% to 20% by mass B2O3; 20% to 45% by mass SrO; 5% to 15% by mass F; and 0% to 10% by mass Na2O.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 6, 2018
    Applicant: SHOFU INC.
    Inventors: Daisuke HARA, Yuji SADAKANE, Katsura ISHIKAWA, Hidefumi FUJIMURA, Shuji SAKAMOTO, Akihiro NAGAFUJI, Toshiyuki NAKATSUKA
  • Patent number: 9456964
    Abstract: A dental resin temporary sealing material composition that is excellent in adhesion to the tooth substance and removability of the hardened material and has a preventive function of releasing various ions including a fluoride ion is provided. The adhesion to cavity walls can be improved and, since there is little dimensional change during hardening, excellent sealability in a cavity can be attained.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: October 4, 2016
    Assignee: SHOFU INC.
    Inventors: Yuji Sadakane, Katsura Ishikawa, Toshiyuki Nakatsuka
  • Publication number: 20150342838
    Abstract: To provide a dental composition wherein the acid buffering capacity can be attained and the acid resistance of the tooth substance can be improved while maintaining very high foul breath inhibition capacity. A dental composition including: ion sustained-release glass; and a carrier for supporting the ion sustained-release glass, wherein the ion sustained-release glass is fluoroaluminoborosilicate glass having a composition range of: 15% to 35% by mass SiO2; 15% to 30% by mass Al2O3; 5% to 20% by mass B2O3; 20% to 45% by mass SrO; 5% to 15% by mass F; and 0% to 10% by mass Na2O.
    Type: Application
    Filed: January 9, 2015
    Publication date: December 3, 2015
    Inventors: Daisuke HARA, Yuji SADAKANE, Katsura ISHIKAWA, Hidefumi FUJIMURA, Shuji SAKAMOTO, Akihiro NAGAFUJI, Toshiyuki NAKATSUKA
  • Publication number: 20150342840
    Abstract: A dental resin temporary sealing material composition that is excellent in adhesion to the tooth substance and removability of the hardened material and has a preventive function of releasing various ions including a fluoride ion is provided. The adhesion to cavity walls can be improved and, since there is little dimensional change during hardening, excellent sealability in a cavity can be attained.
    Type: Application
    Filed: January 9, 2015
    Publication date: December 3, 2015
    Inventors: Yuji SADAKANE, Katsura ISHIKAWA, Toshiyuki NAKATSUKA