(19)

(11)

EP 2 440 720 A1

(12)

(43) Date of publication: 18.04.2012 Bulletin 2012/16 (21) Application number: 10734535.7 (22) Date of filing: 14.06.2010

(51) International Patent Classification (IPC):  E04D 1/30(2006.01) E03B 3/03(2006.01) E04D 13/04(2006.01) (86) International application number: PCT/GB2010/050988 (87) International publication number: WO 2010/143002 (16.12.2010 Gazette 2010/50)

(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 SE SI SK SM TR (30) Priority: 12.06.2009 GB 0911431 (71) Applicant: NU-Sustainable Limited Northamptonshire NN8 4RQ (GB)	(72) Inventor: SAXBY, Clive Andrew South Wales CF5 4BP (GB) (74) Representative: Davies, Elliott et al Chapman Molony Cardiff Business Techn. Centre Senghennydd Road Cardiff CF24 4AY Cardiff CF24 4AY (GB)