Chemistry: electrical and wave energy – Apparatus – Electrolytic
Reexamination Certificate
2007-07-10
2007-07-10
Olsen, Kaj K. (Department: 1753)
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C029S592100
Reexamination Certificate
active
10446659
ABSTRACT:
A gas sensor comprises a cylindrical metallic housing, a sensor element having at a front end thereof a sensing portion and disposed axially in the housing with the sensing portion protruded from a front end of the housing, a sensor terminal fitted to a rear end of the sensor element to produce a signal output from the sensing portion, a first protective cover attached to a front end portion of the housing to cover the sensing portion and a second protective cover attached to a rear end portion of the housing to cover the sensor terminal. The first and second protective covers includes attachment portions attached around the front and rear end portions of the housing, respectively. At least one of the attachment portions of the first and second protective covers has a lower hardness than a remaining portion of the protective cover.
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European Search Report for EP 03 01 8453 dated Dec. 12, 2003.
Fujita Yasuhiro
Hayashi Takahiro
Iimi Hitoshi
Matsubara Yoshiaki
Taguchi Masataka
NGK Spark Plug Co. Ltd.
Olsen Kaj K.
Sughrue & Mion, PLLC
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