(19)

(11)

EP 3 417 109 A1

(12)

(43) Date of publication: 26.12.2018 Bulletin 2018/52 (21) Application number: 17710066.6 (22) Date of filing: 15.02.2017

(51) International Patent Classification (IPC):  E01C 1/00(2006.01) E01C 5/00(2006.01) E01C 3/00(2006.01) E01F 8/00(2006.01) (86) International application number: PCT/NL2017/050091 (87) International publication number: WO 2017/142404 (24.08.2017 Gazette 2017/34)

(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: MA MD (30) Priority: 18.02.2016 NL 2016280 (71) Applicant: Universiteit Twente 7522 NB Enschede (NL)	(72) Inventor: WIJNANT, Ysbrand Hans 7546 HG Enschede (NL) (74) Representative: Hylarides, Paul Jacques et al Arnold & Siedsma Bezuidenhoutseweg 57 2594 AC Den Haag 2594 AC Den Haag (NL)