Shaped objects for pyrogen retention and processes for their manufacture
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United States of America Patent
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Oct 14, 2003
Grant Date -
Jul 5, 2001
app pub date -
Dec 22, 2000
filing date -
Dec 23, 1999
priority date (Note) -
Expired
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Abstract
The invention describes hydrophilically acting shaped objects, in particular semipermeable membranes for pyrogen retention, comprising a synthetic polymer component and an additive made from a copolymer made from vinylpyrrolidone and a vinylimidazole compound, and furthermore processes for manufacturing the shaped objects. The shaped objects of the invention exhibit such a high pyrogen retention capacity that the pyrogen concentrations present in the filtrates are in part below the detection limit of the gel clot LAL test.
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