Chemical apparatus and process disinfecting – deodorizing – preser – Analyzer – structured indicator – or manipulative laboratory... – Means for analyzing liquid or solid sample
Reexamination Certificate
2004-09-10
2010-11-09
Warden, Jill (Department: 1797)
Chemical apparatus and process disinfecting, deodorizing, preser
Analyzer, structured indicator, or manipulative laboratory...
Means for analyzing liquid or solid sample
C422S067000, C422S082010, C422S082020, C436S147000, C436S150000, C436S157000, C073S061410, C073S061760, C324S705000, C324S706000, C204S228600, C204S229800, C702S023000, C702S025000, C702S032000, C702S127000, C702S136000
Reexamination Certificate
active
07829024
ABSTRACT:
A urea concentration identification device comprising a concentration identification sensor unit (2) and a support unit (4) attached at the bottom end thereof with this sensor unit and provided at the top end thereof with a mounting unit (4a) to a urea solution tank opening. The concentration identification sensor unit (2) has an indirectly-heated concentration detector and liquid temperature detector provided with metal fins (21c),(22c), respectively, for heat-exchanging with urea solution. The concentration identification sensor unit (2) is provided with a cover member (2d) that forms an opposite-ends-opened urea solution induction passage so as to surround the metal fins (21c),(22c), and an enclosure (2e) that forms communication holes (26),(27) in the top and bottom end plate thereof (2e1),(2e2). A single-pulse voltage is applied to the heating element of the indirectly-heated concentration detector to heat it, and a urea concentration is identified at an identification operation unit based on an output from a concentration detection circuit including the temperature sensing element of the indirectly-heated concentration detector and the liquid temperature detector.
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Izutani Kenjiro
Takahata Takayuki
Chan Cedric
Frommer & Lawrence & Haug LLP
Mitsui Mining & Smelting Co. Ltd.
Santucci Ronald R.
Warden Jill
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