(19)

(11)

EP 2 737 139 A2

(12)

(88) Date of publication A3: 20.06.2013 (43) Date of publication: 04.06.2014 Bulletin 2014/23 (21) Application number: 12840496.9 (22) Date of filing: 25.07.2012

(51) International Patent Classification (IPC):  E04C 2/00(2006.01) (86) International application number: PCT/US2012/048065 (87) International publication number: WO 2013/055428 (18.04.2013 Gazette 2013/16)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 26.07.2011 US 201161511891 P 17.11.2011 US 201161560897 P (71) Applicant: Propst Family Limited Partnership Phoenix, AZ 85018 (US)	(72) Inventor: PROPST, John Eugen Phoenix, Arizona 85018 (US) (74) Representative: Kuhnen & Wacker  Patent- und Rechtsanwaltsbüro Prinz-Ludwig-Straße 40A 85354 Freising 85354 Freising (DE)