(19)

(11)

EP 1 152 818 A2

(12)

(88) Date of publication A3: 19.10.2000 (43) Date of publication: 14.11.2001 Bulletin 2001/46 (21) Application number: 99968408.7 (22) Date of filing: 23.12.1999

(51) International Patent Classification (IPC)7: B01F 1/00 (86) International application number: PCT/IB9902/113 (87) International publication number: WO 0038/497 (06.07.2000 Gazette 2000/27)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 24.12.1998 AU PP793498 01.09.1999 AU PP257398 (71) Applicant: Cook Incorporated Bloomington, IN 47403 (US)	(72) Inventor: SMITH, Allan, Joseph, Hilling Wishart, QLD 4122 (AU) (74) Representative: Johnston, Kenneth Graham  c(o Cook (UK) Ltd.Patent DepartmentMonroe House LetchworthHertfordshire SG6 1LN LetchworthHertfordshire SG6 1LN (GB)