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EP 2 699 712 A2

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(88) Date of publication A3: 18.04.2013 (43) Date of publication: 26.02.2014 Bulletin 2014/09 (21) Application number: 12723753.5 (22) Date of filing: 19.04.2012

(51) International Patent Classification (IPC):  C23C 18/02(2006.01) C25B 11/03(2006.01) C23F 1/08(2006.01) C25C 7/02(2006.01) (86) International application number: PCT/JP2012/061161 (87) International publication number: WO 2012/144651 (26.10.2012 Gazette 2012/43)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 22.04.2011 JP 2011096507 (71) Applicants: Permelec Electrode Ltd. Fujisawa-city, Kanagawa 252-0816 (JP) Industrie De Nora S.P.A. 20134 Milano (IT)	(72) Inventors: HAMAGUCHI, Katsumi Fujisawa-shi, Kanagawa 252-0816 (JP) TAMAI, Akio Fujisawa-shi, Kanagawa 252-0816 (JP) KUNIMATSU, Akira Fujisawa-shi, Kanagawa 252-0816 (JP) SHIMIZU, Hideto Fujisawa-shi, Kanagawa 252-0816 (JP) (74) Representative: Reitstötter - Kinzebach  Patentanwälte Sternwartstrasse 4 81679 München 81679 München (DE)