Patents by Inventor Noriko Sawada

Noriko Sawada 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).

  • Surge absorbing element
    Patent number: 8400254
    Abstract: A surge absorbing element has a first electrode, a second electrode, and a ceramic layer. The second electrode is opposed to the first electrode. The ceramic layer has a polycrystal structure including a plurality of crystal grains showing voltage nonlinearity, and is at least partially brought into contact with the first electrode and the second electrode. The ceramic layer has a void inside therein, and surface discharge is generated on surfaces, exposed to the void, of the crystal grains, whereby electric conduction is attained between the first and second electrodes.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: March 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Eiichi Koga, Noriko Sawada, Mikinori Amisawa, Seiichi Minami, Hirofumi Yamada, Tomohisa Okimoto
  • SURGE ABSORBING ELEMENT
    Publication number: 20110304946
    Abstract: A surge absorbing element has a first electrode, a second electrode, and a ceramic layer. The second electrode is opposed to the first electrode. The ceramic layer has a polycrystal structure including a plurality of crystal grains showing voltage nonlinearity, and is at least partially brought into contact with the first electrode and the second electrode. The ceramic layer has a void inside therein, and surface discharge is generated on surfaces, exposed to the void, of the crystal grains, whereby electric conduction is attained between the first and second electrodes.
    Type: Application
    Filed: April 13, 2010
    Publication date: December 15, 2011
    Inventors: Eiichi Koga, Noriko Sawada, Mikinori Amisawa, Seiichi Minami, Hirofumi Yamada, Tomohisa Okimoto
  • Voltage non-linear resistor ceramic composition and multilayer varistor using the same
    Patent number: 7973638
    Abstract: A voltage non-linear resistor ceramic composition has ZnO as a main component and is represented by the general formula (1?x)ZnO+x[Sr1?yMy]1?a[Co1?zAz]1+aO3. Here, M is at least one of Ca and Ba, and A is Mn or Cr. x, y, z and a indicate molar ratios, and 0.0005?x?0.10, 0?y?0.8, 0?z?0.8, and ?0.1?a?0.2 are satisfied.
    Type: Grant
    Filed: March 11, 2009
    Date of Patent: July 5, 2011
    Assignee: Panasonic Corporation
    Inventors: Eiichi Koga, Noriko Sawada
  • VOLTAGE NON-LINEAR RESISTOR CERAMIC COMPOSITION AND MULTILAYER VARISTOR USING THE SAME
    Publication number: 20090231084
    Abstract: A voltage non-linear resistor ceramic composition has ZnO as a main component and is represented by the general formula (1?x)ZnO+x[Sr1?yMy]1?a[Co1?zAz]1+aO3. Here, M is at least one of Ca and Ba, and A is Mn or Cr. x, y, z and a indicate molar ratios, and 0.0005?x?0.10, 0?y?0.8, 0?z?0.8, and ?0.1?a?0.2 are satisfied.
    Type: Application
    Filed: March 11, 2009
    Publication date: September 17, 2009
    Applicant: Panasonic Corporation
    Inventors: Eiichi KOGA, Noriko SAWADA