(19)

(11)

EP 3 710 644 A1

(12)

(43) Date of publication: 23.09.2020 Bulletin 2020/39 (21) Application number: 18833111.0 (22) Date of filing: 16.11.2018

(51) International Patent Classification (IPC):  E04B 1/41(2006.01) (86) International application number: PCT/IB2018/059045 (87) International publication number: WO 2019/097471 (23.05.2019 Gazette 2019/21)

(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 Designated Extension States: BA ME Designated Validation States: KH MA MD TN (30) Priority: 16.11.2017 IT 201700131321 (71) Applicant: Chryso Italia S.R.L. 20097 San Donato Milanese (IT)	(72) Inventor: RAGOZZINI, Roberto Zeccone -pavia 27012 (IT) (74) Representative: Lavoix  2, place d'Estienne d'Orves 75441 Paris Cedex 09 75441 Paris Cedex 09 (FR)