(19)

(11)

EP 0 869 836 A2

(12)

(43) Date of publication: 14.10.1998 Bulletin 1998/42 (21) Application number: 96944900.0 (22) Date of filing: 20.12.1996

(51) International Patent Classification (IPC):  B01D 29/ 11( . ) B01D 29/ 52( . ) B01D 46/ 24( . ) B01D 29/ 50( . ) B01D 46/ 00( . ) B01D 46/ 52( . ) (86) International application number: PCT/US1996/020336 (87) International publication number: WO 1997/024169 (10.07.1997 Gazette 1997/30)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 21.12.1995 US 19950009032P (71) Applicant: Pall Corporation East Hills, New York 11548 (US)

(72) Inventors: CONNORS, James, T., Jr. Groton, NY 13073 (US) MILLER, John, D. Ithaca, NY 14850 (US) PERI, Joseph, A. DeRuyter, NY 13052 (US) MAYBEE, Stephen, J., A. Trumansburg, NY 14886 (US) STOYELL, Richard, C., Jr. Moravia, NY 13118 (US) (74) Representative: Knott, Stephen Gilbert, et al  MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge UB10 8BZ Ickenham Uxbridge UB10 8BZ (GB)