(19)

(11)

EP 1 841 901 A1

(12)

(43) Date of publication: 10.10.2007 Bulletin 2007/41 (21) Application number: 05722638.3 (22) Date of filing: 27.01.2005

(51) International Patent Classification (IPC):  C25B 11/04(2006.01) (86) International application number: PCT/US2005/003046 (87) International publication number: WO 2006/080926 (03.08.2006 Gazette 2006/31)

(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 MC NL PL PT RO SE SI SK TR (71) Applicant: Industrie De Nora S.p.A. 20134 Milan (IT)	(72) Inventors: CARLSON, Richard C. Euclid, Ohio 44123 (US) MOATS, Michael S. Painesville, Ohio 44077 (US) HARDEE, Kenneth L. Middlefield, Ohio 44062 (US) (74) Representative: Cronin, Brian Harold John  CRONIN Intellectual Property Chemin de Précossy 31 1260 Nyon 1260 Nyon (CH)