(19)

(11)

EP 1 848 879 A2

(12)

(88) Date of publication A3: 28.06.2007 (43) Date of publication: 31.10.2007 Bulletin 2007/44 (21) Application number: 06720612.8 (22) Date of filing: 10.02.2006

(51) International Patent Classification (IPC):  F01N 3/28(2006.01) (86) International application number: PCT/US2006/004745 (87) International publication number: WO 2006/088733 (24.08.2006 Gazette 2006/34)

(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 LV MC NL PL PT RO SE SI SK TR Designated Extension States: AL BA HR MK YU (30) Priority: 15.02.2005 JP 2005037270 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventors: YASUDA, Daigo Setagaya, Tokyo 158-8583 (JP) KISHI, Fumihiko Setagaya, Tokyo 158-8583 (JP) SAKO, Kenji Setagaya, Tokyo 158-8583 (JP) WATANABE, Toshiyuki Setagaya, Tokyo 158-8583 (JP) (74) Representative: Hilleringmann, Jochen  Von Kreisler Selting Werner Bahnhofsvorplatz 1 (Deichmannnhaus) 50667 Köln 50667 Köln (DE)