Classifying – separating – and assorting solids – Sifting – Elements
Reexamination Certificate
2011-03-15
2011-03-15
Karmis, Stefanos (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Elements
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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Backes Douglas J.
Dutton Melinda S.
Godfrey Max R.
Poulter Clay B.
Tolman Dennis K.
Alliant Techsystems Inc.
Karmis Stefanos
Kumar Kalyanavenkateshware
TraskBritt
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