Patents by Inventor Yuko Hozumi

Yuko Hozumi 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).

  • Microcapsulating conductive metal particles with polymerized monomers
    Patent number: 6737108
    Abstract: A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used.
    Type: Grant
    Filed: May 14, 2002
    Date of Patent: May 18, 2004
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Date, Makoto Usui, Isao Watanabe, Yuko Hozumi
  • Method for production of microcapsule type conductive filler
    Publication number: 20020197399
    Abstract: A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used.
    Type: Application
    Filed: May 14, 2002
    Publication date: December 26, 2002
    Applicant: Fujitsu Limited
    Inventors: Hiroaki Date, Makoto Usui, Isao Watanabe, Yuko Hozumi
  • Microcapsulating conductive metal particles with polymerized monomers
    Patent number: 6406746
    Abstract: A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: June 18, 2002
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Date, Makoto Usui, Isao Watanabe, Yuko Hozumi
  • Method for production of microcapsule type conductive filler
    Patent number: 6080443
    Abstract: A process for producing a MC-type conductive filler includes treating minute metallic particles with a coupling agent, preparing an oil phase of the coupling agent-treated minute metallic particles and a reactive substance A, the reactive substance A directly contacting the metallic particles. Then, an aqueous phase is prepared having a reactive substance B, which is capable of reacting with the reactive substance A, dissolved in water. Thereafter, the oil phase is dispersed in the aqueous phase to form a suspension. In situ reaction of the reactive substances A and B is then caused by applying heat to the suspension or adding a catalyst to the suspension. This forms a coating of a thermosetting insulating resin on the surface of the minute metallic particles. Alternatively, the reactive substance B may not be used.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: June 27, 2000
    Assignee: Fujitsu Limited
    Inventors: Hiroaki Date, Makoto Usui, Isao Watanabe, Yuko Hozumi