Apparatus and methods for filtering granular solid material

Classifying – separating – and assorting solids – Sifting – Elements

Reexamination Certificate

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Details

C209S274000, C209S281000, C209S353000, C209S355000, C210S318000, C210S321770, C210S321860, C210S346000

Reexamination Certificate

active

07905358

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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