Classifying – separating – and assorting solids – Precedent preparation of items or materials to facilitate... – Selective differentiation
Reexamination Certificate
2007-04-10
2011-12-27
Rodriguez, Joseph C (Department: 3653)
Classifying, separating, and assorting solids
Precedent preparation of items or materials to facilitate...
Selective differentiation
C209S172000, C209S173000
Reexamination Certificate
active
08083067
ABSTRACT:
Enhanced methods for separating of overlapping density porous materials are provided. The methods of the invention exploit the differences in the porosity of porous feed materials compared to that of the solid plastics. In the first stage, air is forced out of the pores of a porous feed material. In the second stage, a solution, having the appropriate density, is forced into the pores. This increases the density of the porous material relative to the density of the solid plastics. As a result, the porous material can be made to sink, while the solid plastics continue to float.
REFERENCES:
patent: 4591431 (1986-05-01), Sinha
patent: 5653867 (1997-08-01), Jody et al.
patent: 2005/0139529 (2005-06-01), Mannes
Daniels Edward J.
Jody Bassam J.
Lockwood Scott T.
Pomykala, Jr. Joseph A.
Spangenberger Jeffrey S.
Kumar Kalyanavenkateshware
Pennington Joan
Rodriguez Joseph C
UChicago Argonne LLC
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