Liquid purification or separation – Particulate material type separator – e.g. – ion exchange or...
Reexamination Certificate
2003-10-09
2009-08-25
Hopkins, Robert A (Department: 1797)
Liquid purification or separation
Particulate material type separator, e.g., ion exchange or...
C210S671000, C096S131000, C096S135000
Reexamination Certificate
active
07578938
ABSTRACT:
Filtering medium based on activated carbon which is characterized in that it comprises three superposed layers, respectively an inner layer and two outer layers, the inner layer consisting of 80 to 95% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, the first outer layer comprising from 45 to 95% by dry weight of organic and/or inorganic chemical fibres, the balance for 100% consisting of activated carbon and/or of a material having a density of less than 0.9, the second outer layer comprising from 5 to 25% by dry weight of activated carbon, the balance for 100% consisting of organic and/or inorganic chemical fibres, and in that the weight of the inner layer is between 40 and 200 g/m2 and the weight of the outer layers is between 10 and 100 g/m2.
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Chauve Valérie
Dufour Menno
Dussaud Joseph
Escaffre Pascale
Gauthier Gilles
Ahlstrom Corporation
Hopkins Robert A
Nixon & Vanderhye P.C.
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