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(11)

EP 1 866 238 A1

(12)

(43) Date of publication: 19.12.2007 Bulletin 2007/51 (21) Application number: 06731338.7 (22) Date of filing: 31.03.2006

(51) International Patent Classification (IPC):  C01B 3/00(2006.01) (86) International application number: PCT/JP2006/307390 (87) International publication number: WO 2006/104274 (05.10.2006 Gazette 2006/40)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 31.03.2005 JP 2005105085 (71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA Toyota-shi, Aichi-ken, 471-8571 (JP)	(72) Inventors: SHINOZAWA, Tamio , Toyota-shi, Aichi, 4718571 (JP) MATSUNAGA, Tomoya , Toyota-shi, Aichi, 4718571 (JP) (74) Representative: Kuhnen & Wacker  Intellectual Property Law Firm Prinz-Ludwig-Strasse 40A 85354 Freising 85354 Freising (DE)