(19)

(11)

EP 0 491 006 A1

(12)

(43) Date of publication: 24.06.1992 Bulletin 1992/26 (21) Application number: 90915330.0 (22) Date of filing: 04.10.1990

(51) International Patent Classification (IPC):  B01D 15/ 02( . ) B01J 8/ 20( . ) B01J 47/ 00( . ) B01J 49/ 00( . ) B01J 8/ 08( . ) B01J 41/ 04( . ) B01J 47/ 10( . ) (86) International application number: PCT/GB1990/001514 (87) International publication number: WO 1991/004791 (18.04.1991 Gazette 1991/09)

(84) Designated Contracting States: AT BE CH DE DK ES FR GB IT LI LU NL SE (30) Priority: 05.10.1989 GB 19890022503 (71) Applicant: CROSSFLOW MICROFILTRATION LIMITED London W1X7HB (GB)	(72) Inventors: BELMORE, Joseph, Jeremy Caversham Reading RG4 0QN (GB) COX, Michael Hitchin Hertfordshire SG4 8QT (GB) SQUIRES, Rodney, Charles Fresno, CA 93711 (US) (74) Representative: Lyndon-Stanford, Edward Willoughby Brooke  MARKS & CLERK, 57/60 Lincoln's Inn Fields London WC2A 3LS London WC2A 3LS (GB)