Electrical resistors – Resistance value responsive to a condition – Current and/or voltage
Reexamination Certificate
2011-06-28
2011-06-28
Lee, Kyung (Department: 2833)
Electrical resistors
Resistance value responsive to a condition
Current and/or voltage
C338S020000
Reexamination Certificate
active
07969277
ABSTRACT:
A nonlinear resistor ceramic composition has a major component containing zinc oxide, a first minor component containing an oxide of a rare-earth metal, a second minor component containing an oxide of Ca, and a third minor component containing an oxide of Si. A percentage of the second minor component to 100 moles of the major component is in the range of 2 atomic %≦the second minor component<80 atomic % in terms of Ca. A percentage of the third minor component to 100 moles of the major component is in the range of 1 atomic %≦the third minor component<40 atomic % in terms of Si. An atomic ratio of Ca to Si (Ca/Si) is not less than 1.
REFERENCES:
patent: 4290041 (1981-09-01), Utsumi et al.
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English language version of Chinese Office Action issued in Chinese Patent Application No. 200810128051.7, dated Jun. 23, 2010.
Oct. 8, 2009 Office Action issued in German Patent Application No. 10 2008 031 663.6 (with translation).
Lee Kyung
Oliff & Berridg,e PLC
TDK Corporation
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