Leukapheretic filter medium
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United States of America Patent
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Jul 31, 2001
Grant Date -
N/A
app pub date -
Dec 27, 1999
filing date -
Jun 26, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A leukocyte-removing filter medium which comprises a matrix and ultra-fine fibers having a fiber diameter of less than 1.0 .mu.m and not less than 0.01 .mu.m which contains ultra-fine fibers in an amount of less than 50 wt % and not less than 0.1 wt %, the degree of curvature of the ultra-fine fibers being 1.2 or more, and/or the ultra-fine fibers form pores having a roundness of 1.7 or less.
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