Filter vent fitting
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United States of America Patent
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Apr 22, 2003
Grant Date -
Jun 13, 2002
app pub date -
Dec 8, 2000
filing date -
Dec 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter vent fitting for a drum which allows for the passage of hydrogen gas but precludes the passage of radioactive particulates, the fitting having evacuation/pressurization conduits which allow the drum to be evacuated or pressurized, and cryogenic/sapling conduits which allow the temperature of the drum to be reduced and samples drawn from the interior which are not filtered. Preferably a cap member is provided with a pressure balancing bore which is active during the evacuation and pressurization steps.
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