GRADIENT DENSITY FILTER
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专利名称：GRADIENT DENSITY FILTER
发明人：ELLEFSON, Peter, J.,WELLS, David, J.申请号：EP95943886.0
申请日：19951219
公开号：EP0806979A1
公开日：
19971119
专利内容由知识产权出版社提供
摘要：A gradient density filter made from sheets of blown polypropylene microfibers where the microfibers of at least one of the sheets have an effective fiber diameter less than that of the other sheets is described. This filter is especially useful in solid phase extraction processes, particularly those where biological fluids are being analyzed.
申请人：MINNESOTA MINING AND MANUFACTURING COMPANY
地址：3M Center, P.O. Box 33427 St. Paul, Minnesota 55133-3427 US
国籍：US
代理机构：Meyers, Hans-Wilhelm, Dr.Dipl.-Chem., et al
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