(19)

(11)

EP 1 670 971 A1

(12)

(43) Date of publication: 21.06.2006 Bulletin 2006/25 (21) Application number: 04789693.1 (22) Date of filing: 06.10.2004

(51) International Patent Classification (IPC):  C23F 13/02(1985.01) (86) International application number: PCT/CA2004/001783 (87) International publication number: WO 2005/035831 (21.04.2005 Gazette 2005/16)

(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 PL PT RO SE SI SK TR (30) Priority: 10.10.2003 CA 2444638 (71) Applicant: Whitmore, David Winnipeg, Manitoba R3T 3E5 (CA)	(72) Inventor: Whitmore, David Winnipeg, Manitoba R3T 3E5 (CA) (74) Representative: Jostarndt, Hans-Dieter  Brüsseler Ring 51 52074 Aachen 52074 Aachen (DE)