Patents by Inventor Masuhisa Hirota

Masuhisa Hirota 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).

  • Method for manufacturing powdered raw material for dielectric ceramic
    Patent number: 6436862
    Abstract: A method for manufacturing a powdered raw material of a basic powdered dielectric ceramic composition having compounds containing metal elements thereon. The method comprises the steps of dispersing a basic powdered dielectric ceramic composition in water to form a slurry, adding a silicon compound to the slurry to coat the powder, adding a solution containing the metal elements and a precipitating agent reactive therewith to form a precipitate, while the slurry is being stirred, and rinsing and drying the slurry.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: August 20, 2002
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Masuhisa Hirota, Shozo Kojima, Masami Yabuuchi