Patents by Inventor Sumiko MASUO

Sumiko MASUO 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).

  • GAS SENSOR ELEMENT TREATMENT METHOD
    Publication number: 20090205193
    Abstract: A gas sensor element is heated at a temperature of 500° C. or higher for 15 minutes or more in a treatment atmosphere containing one or more gases selected from the gas group consisting of nitrogen (N2), oxygen (O2), carbon monoxide (CO), hydrogen (H2) and hydrocarbons (HC) and giving an air ratio of 0.80 to 1.10. In a gas sensor element to which such a treatment has been applied, a stable output is obtained without causing overshoot to an actual NOx concentration (input) even when a rapid exhaust gas change takes place.
    Type: Application
    Filed: March 24, 2009
    Publication date: August 20, 2009
    Applicant: NGK Insulators, Ltd.
    Inventors: Kunihiko NAKAGAKI, San Jae LEE, Sumiko MASUO