Patents by Inventor Toru Kuzumaki

Toru Kuzumaki 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).

  • Fullerene-added lead zirconate titanate and method of producing the same
    Patent number: 6409935
    Abstract: The invention is a novel fullerene-added lead zirconate titanate and a method of producing the same, wherein zirconium alkoxide, titanium alkoxide and lead acetate are dissolved in an organic solvent with a stabilizer to form a colloidal solution or sol. The colloidal solution is added with fullerene, gelatinized, dried and fired at a relatively low temperature, for example, 400 to 500° C., whereby a perovskite phase can effectively be formed at a temperature lower than in conventional methods.
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: June 25, 2002
    Assignee: Tokyo, The University of
    Inventors: Kun-ichi Miyazawa, Kunio Ito, Toru Kuzumaki, Fumie Seki
  • Method of producing fullerene-dispersed ceramics
    Patent number: 6255241
    Abstract: A fullerene-dispersed ceramic is produced by an improved method in which C60 or like fullerene, and C16TMA or like surfactant, are dissolved in a solution of metallic compound, such as zirconyl nitrate, to form a colloidal solution. A gel is formed from the colloidal solution by changing its hydrogen ion concentration. The gel is dried and subjected to heat treatment, to eliminate remaining solvent and surfactant, and thereby stably obtain the desired fullerene-dispersed ceramic powder in which the fullerene is uniformly dispersed and which is essentially free from carbon other than fullerene.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: July 3, 2001
    Assignee: The University of Tokyo
    Inventors: Kun-ichi Miyazawa, Itaru Honma, Junya Yano, Kunio Ito, Toru Kuzumaki