Patents by Inventor Michimasa Tamura

Michimasa Tamura 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).

  • Silica composite oxide particles and method of producing the same
    Patent number: 6770130
    Abstract: Silica composite oxide particles comprising silica and a metal oxide other than silica, the content of the metal oxide other than silica being from 30 to 50 mol %, and a coefficient of variation in the particle diameter being not larger than 30%. The silica composite oxide particles contain metal oxides other than silica in an amount of not smaller than 30 mol %, which could not be produced thus far, and feature excellent spherical shape and excellent monodispersion property.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: August 3, 2004
    Assignee: Tokuyama Corporation
    Inventors: Hiroshi Kato, Michimasa Tamura, Makoto Kameda
  • Silica composite oxide particles and method of producing the same
    Publication number: 20030133890
    Abstract: Silica composite oxide particles comprising silica and a metal oxide other than silica, the content of the metal oxide other than silica being from 30 to 50 mol %, and a coefficient of variation in the particle diameter being not larger than 30%. The silica composite oxide particles contain metal oxides other than silica in an amount of not smaller than 30 mol %, which could not be produced thus far, and feature excellent spherical shape and excellent monodispersion property.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 17, 2003
    Inventors: Hiroshi Kato, Michimasa Tamura, Makoto Kameda