Chemistry: analytical and immunological testing – Nitrogen containing – Oxides of nitrogen
Reexamination Certificate
2004-07-13
2008-01-29
Soderquist, Arlen (Department: 1743)
Chemistry: analytical and immunological testing
Nitrogen containing
Oxides of nitrogen
C422S052000, C422S083000, C422S090000, C422S093000, C422S098000, C436S043000, C436S052000, C436S117000, C436S118000, C436S135000, C436S149000, C436S172000, C436S181000
Reexamination Certificate
active
07323343
ABSTRACT:
An analytical system is provided for determining nitrogen monoxide, nitrogen dioxide and ozone concentrations in air samples. An ultraviolet light source4is used to alter the equilibrium between nitrogen dioxide and oxygen on the one hand and nitrogen monoxide and ozone on the other. Dynamic measurement of ozone concentration with time while ultraviolet irradiation is pulsed enables each gas concentration to be calculated without requiring input gases to be scrubbed. An aApparatus101is further provided to provide a controlled flow of gas to a sensor103attached to a high altitude balloon while sheltering it from the elements and allowing for affects of temperature, said apparatus comprising a shield104and a gas conducting means which uses the venturi effect to control air flow or has a hole to allow water to drain without affecting air flow past the sensor.
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Cox Richard Anthony
Jones Roderic Lewis
Cambridge University Technical Services Limited
Fortkort Michael P.
Fortkort & Houston P.C.
Soderquist Arlen
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