(19)

(11)

EP 3 947 831 A1

(12)

(43) Date of publication: 09.02.2022 Bulletin 2022/06 (21) Application number: 20714215.9 (22) Date of filing: 27.03.2020

(51) International Patent Classification (IPC):  E02F 9/28(2006.01) E02F 9/26(2006.01) (52) Cooperative Patent Classification (CPC): E02F 9/28; E02F 9/26 (86) International application number: PCT/EP2020/058784 (87) International publication number: WO 2020/201125 (08.10.2020 Gazette 2020/41)

(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: 29.03.2019 EP 19382230 (71) Applicant: Metalogenia Research & Technologies S.L. 08005 Barcelona (ES)	(72) Inventors: GAVALDÀ I MONEDERO, Jordi 08450 Llinars del Vallès Barcelona (ES) MARQUEZ LLINAS, Jordi 08223 Terrassa (ES) ALONSO FRIGOLA, Ester 17460 Celrà Girona (ES) (74) Representative: Curell Suñol S.L.P.  Muntaner 240, 4º 2ª 08021 Barcelona 08021 Barcelona (ES)