(19)

(11)

EP 1 874 412 A1

(12)

(43) Date of publication: 09.01.2008 Bulletin 2008/02 (21) Application number: 06741384.9 (22) Date of filing: 13.04.2006

(51) International Patent Classification (IPC):  A62C 31/12(2006.01) B05B 3/04(2006.01) A62C 35/00(2006.01) (86) International application number: PCT/CA2006/000590 (87) International publication number: WO 2006/108298 (19.10.2006 Gazette 2006/42)

(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 (30) Priority: 15.04.2005 US 106503 15.04.2005 CA 2505911 (71) Applicant: NATIONAL RESEARCH COUNCIL OF CANADA Ottawa, Ontario K1A OR6 (CA)	(72) Inventor: CRAMPTON, George, Patrick Carp, Ontario K0A 1L0 (CA) (74) Representative: Kritzenberger, Jürgen Hermann  Zipse Habersack Kritzenberger Werftstrasse 5 93059 Regensburg 93059 Regensburg (DE)