Filter top assembly
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United States of America Patent
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Apr 10, 2012
Grant Date -
Jun 3, 2010
app pub date -
Aug 21, 2009
filing date -
Aug 21, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A filter top assembly for a cage, wherein the assembly includes a bonnet having a perforated top wall to protect filter paper placed above the top wall. The perforations may be small enough to prevent an animal from getting a purchase position and spaced apart sufficiently to prevent the animal from biting the spacing between the perforations. The bonnet may also include one or more elevated ribs to retain the filter paper suspended above the bonnet.
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