(19)

(11)

EP 2 004 875 A1

(12)

(43) Date of publication: 24.12.2008 Bulletin 2008/52 (21) Application number: 07701806.7 (22) Date of filing: 21.02.2007

(51) International Patent Classification (IPC):  C23F 13/16(2006.01) (86) International application number: PCT/CA2007/000260 (87) International publication number: WO 2007/101325 (13.09.2007 Gazette 2007/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR (30) Priority: 07.03.2006 CA 2538949 (71) Applicant: Whitmore, David W. Winnipeg, Manitoba R3Y 1G4 (CA)	(72) Inventor: Whitmore, David W. Winnipeg, Manitoba R3Y 1G4 (CA) (74) Representative: Jostarndt, Hans-Dieter  Brüsseler Ring 51 52074 Aachen 52074 Aachen (DE)