(19)

(11)

EP 0 888 161 A1

(12)

(43) Date of publication: 07.01.1999 Bulletin 1999/01 (21) Application number: 97914973.0 (22) Date of filing: 11.03.1997

(51) International Patent Classification (IPC):  B01D 29/ 11( . ) B01D 29/ 50( . ) (86) International application number: PCT/US1997/003774 (87) International publication number: WO 1997/033675 (18.09.1997 Gazette 1997/40)

(84) Designated Contracting States: CH DE ES FI FR GB LI SE (30) Priority: 11.03.1996 US 19960013236P (71) Applicant: Pall Corporation East Hills, New York 11548 (US)	(72) Inventors: SIMONSON, Eric, H. Cortland, NY 13045 (US) SOBEL, Nelson, J. Cortland, NY 13045 (US) POSCHMANN, Thomas, W. Centerport, NY 11721 (US) (74) Representative: Bibby, William Mark, et al  Mathisen, Macara & co. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge UB10 8BZ Ickenham Uxbridge UB10 8BZ (GB)