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(11)

EP 1 700 081 A1

(12)

(43) Date of publication: 13.09.2006 Bulletin 2006/37 (21) Application number: 04816697.9 (22) Date of filing: 22.12.2004

(51) International Patent Classification (IPC):  F28F 3/00(2006.01) F28F 3/08(2006.01) (86) International application number: PCT/JP2004/019706 (87) International publication number: WO 2005/061981 (07.07.2005 Gazette 2005/27)

(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 (30) Priority: 22.12.2003 JP 2003423983 30.12.2003 US 532905 P (71) Applicant: SHOWA DENKO KABUSHIKI KAISHA Tokyo 105-8518 (JP)	(72) Inventor: NAKADA, Keiichi, c/o SHOWA DENKO K.K. Oyama-shi, Tochigi 3238678 (JP) (74) Representative: Joly, Jean-Jacques et al Cabinet Beau de Loménie 158, rue de l'Université 75340 Paris Cédex 07 75340 Paris Cédex 07 (FR)