Apparatus and methods for filtering granular solid material
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United States of America Patent
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Mar 15, 2011
Grant Date -
Jan 10, 2008
app pub date -
Jul 7, 2006
filing date -
Jul 7, 2006
priority date (Note) -
Expired
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Abstract
Apparatuses for screening granular solid particulate material include a generally planar first screen and a second screen. A plurality of apertures extends through the first screen. At least a portion of the second screen is oriented at an angle to the first screen, and apertures extend through a perforated region of the second screen. The second screen includes at least one region configured to prevent at least some particles of solid material from passing through the second screen.
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