Biological fluid filter and system

Details Biological fluid filter and system Biological fluid filter and system

2005-09-20

2005-09-20

Walker, W. L. (Department: 1723)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S490000, C210S489000, C210S767000, C210S806000, C210S503000, C210S508000, C210S500270, C210S500350, C210S500370, C604S126000, C604S406000

Reexamination Certificate

active

06945411

ABSTRACT:
A filter for processing a biological fluid is disclosed comprising at least two filter elements wherein the surface of one filter element is substantially non-hydroxylated and has a nitrogen-to-oxygen ratio in the range of from at least 0.01 to less than about 1.00, and the surface of the other filter element is hydroxylated relative to the bulk of the element.

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