Patents by Inventor Yasayuki Okimura

Yasayuki Okimura 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).

  • Conductive sintered oxide, thermistor element including the same, and temperature sensor including the same
    Patent number: 8617433
    Abstract: A conductive sintered oxide including: a first crystal phase represented by RE14Al2O9 and a second crystal phase having a perovskite structure represented by (RE21-cSLc)(AlxM1y)O3. RE1 is a first element group consisting of Yb and/or Lu and at least one element selected from Group IIIA elements excluding Yb, Lu and La. RE2 is a second element group consisting of at least one element selected from Group IIIA elements excluding La and including at least one of the elements constituting the first element group RE1. SL is an element group consisting of at least one of Sr, Ca and Mg and which includes Sr as a main element, and M1 is an element group consisting of at least one element selected from Groups IVA, VA, VIA, VIIA and VIII excluding Cr. The coefficient c is in the range of 0.18<c<0.50, and the coefficients x and y are in the range of 0.95?x+y?1.1.
    Type: Grant
    Filed: August 16, 2011
    Date of Patent: December 31, 2013
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Hiroshi Watanabe, Yasayuki Okimura, Shinji Ban, Takeshi Mitsuoka