(19)

(11)

EP 2 240 652 A1

(12)

(43) Date of publication: 20.10.2010 Bulletin 2010/42 (21) Application number: 08870040.6 (22) Date of filing: 17.10.2008

(51) International Patent Classification (IPC):  E04G 21/00(2006.01) E04B 1/62(2006.01) E04C 2/38(2006.01) E04B 1/18(2006.01) E04C 2/30(2006.01) E04C 3/29(2006.01) (86) International application number: PCT/CA2008/001809 (87) International publication number: WO 2009/086617 (16.07.2009 Gazette 2009/29)

(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: 08.01.2008 US 971018 09.10.2008 US 248051 (71) Applicant: Leo, Ano Calgary, AB T3A 6K4 (CA)	(72) Inventor: Leo, Ano Calgary, AB T3A 6K4 (CA) (74) Representative: Thomson, Neil David  Boult Wade Tennant Verulam Gardens 70 Gray's Inn Road London WC1X 8BT London WC1X 8BT (GB)