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(11)

EP 2 064 305 A1

(12)

(43) Date of publication: 03.06.2009 Bulletin 2009/23 (21) Application number: 08740528.8 (22) Date of filing: 10.04.2008

(51) International Patent Classification (IPC):  C10M 171/00(2006.01) F04B 39/02(2006.01) (86) International application number: PCT/JP2008/057458 (87) International publication number: WO 2009/034738 (19.03.2009 Gazette 2009/12)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 10.09.2007 JP 2007233780 (71) Applicant: Panasonic Corporation Kadoma-shi Osaka 571-8501 (JP)	(72) Inventor: NAKAMURA, Yoichiro c/o Panasonic Corporation Osaka-shi, Osaka 540-6207 (JP) (74) Representative: Pautex Schneider, Nicole Véronique et al Novagraaf International SA 25, avenue du Pailly 1220 Les Avanchets - Geneva 1220 Les Avanchets - Geneva (CH)