Patents by Inventor Kousuke Shiratsuyu

Kousuke Shiratsuyu 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).

  • Porcelain composition for varistor and varistor
    Patent number: 7075404
    Abstract: A varistor is provided which can be driven at a low voltage, has a small leak current, and can realize a high ESD resistance and a high surge resistance. The varistor is formed using a ceramic composition for a varistor which contains zinc oxide as a primary component and sub-components including praseodymium at a content of 0.05 to 3.0 atomic percent of the total, cobalt at a content of 0.5 to 10 atom percent of the total, at least one of potassium, sodium, and lithium at a total content of 0.005 to 0.5 atom percent of the total, at least one of aluminum, gallium, and indium at a total content of 2×10?5 to 0.5 atom percent of the total, and zirconium at a content of 0.005 to 5.0 atom percent of the total.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: July 11, 2006
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Sakyo Hirose, Akinori Nakayama, Kousuke Shiratsuyu
  • Porcelain composition for varistor and varistor
    Publication number: 20050143262
    Abstract: A varistor is provided which can be driven at a low voltage, has a small leak current, and can realize a high ESD resistance and a high surge resistance. The varistor is formed using a ceramic composition for a varistor which contains zinc oxide as a primary component and sub-components including praseodymium at a content of 0.05 to 3.0 atomic percent of the total, cobalt at a content of 0.5 to 10 atom percent of the total, at least one of potassium, sodium, and lithium at a total content of 0.005 to 0.5 atom percent of the total, at least one of aluminum, gallium, and indium at a total content of 2×10?5 to 0.5 atom percent of the total, and zirconium at a content of 0.005 to 5.0 atom percent of the total.
    Type: Application
    Filed: August 13, 2003
    Publication date: June 30, 2005
    Inventors: Sakyo Hirose, Akinori Nakayama, Kousuke Shiratsuyu