(19)

(11)

EP 1 513 607 A1

(12)

(43) Date of publication: 16.03.2005 Bulletin 2005/11 (21) Application number: 03736625.9 (22) Date of filing: 04.06.2003

(51) International Patent Classification (IPC)7: B01F 7/24, B02C 9/02 (86) International application number: PCT/US2003/015401 (87) International publication number: WO 2003/103821 (18.12.2003 Gazette 2003/51)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 04.06.2002 US 385510 P (71) Applicant: KUHN KNIGHT INC. Brodhead, WI 53520 (US)	(72) Inventor: KNIGHT, William, S. Brodhead, WI 53520 (US) (74) Representative: Burford, Anthony Frederick  W.H. Beck, Greener & Co.7 Stone BuildingsLincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)