(19)

(11)

EP 0 667 954 A1

(12)

(43) Date of publication: 23.08.1995 Bulletin 1995/34 (21) Application number: 94900561.0 (22) Date of filing: 08.11.1993

(51) International Patent Classification (IPC):  B01D 65/ 10( . ) G01N 15/ 08( . ) G01N 29/ 22( . ) G01M 3/ 24( . ) G01N 29/ 14( . ) (86) International application number: PCT/US1993/010691 (87) International publication number: WO 1994/011721 (26.05.1994 Gazette 1994/12)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 06.11.1992 US 19920971605 (71) Applicant: Pall Corporation East Hills, New York 11548 (US)	(72) Inventors: HOPKINS, Scott, D. Dryden, NY 13053 (US) SPENCER, Daniel, W. Cortland, NY 13045 (US) LIPARI, Charles, P. Port Jefferson, NY 11777 (US) ALTEMOSE, George, A. Stony Brook, NY 11790 (US) (74) Representative: Knott, Stephen Gilbert, et al  MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge Middlesex UB10 8BZ Ickenham Uxbridge Middlesex UB10 8BZ (GB)