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(11)

EP 3 931 415 A1

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(43) Date of publication: 05.01.2022 Bulletin 2022/01 (21) Application number: 19916635.6 (22) Date of filing: 28.02.2019

(51) International Patent Classification (IPC):  E04H 15/48(2006.01) E04H 15/44(2006.01) (52) Cooperative Patent Classification (CPC): E04H 15/18; E04H 15/44; E04H 15/48; E04H 15/54; E04H 15/60 (86) International application number: PCT/CA2019/050237 (87) International publication number: WO 2020/172735 (03.09.2020 Gazette 2020/36)

(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: 27.02.2019 US 201916287539 (71) Applicant: Weatherhaven Global Resources Ltd. COQUITLAM, BC V3K 6W5 (CA)	(72) Inventors: JOHNSON, Brian D. Mill Bay, British Columbia V0R 2P2 (CA) SAVENKOFF, Ryan Douglas Vancouver, British Columbia V6B 6J3 (CA) CHRISTENSEN, Matt Vancouver, British Columbia V6P 6Z1 (CA) BENNETT, Jean-Marc Surrey, British Columbia V3R 0T9 (CA) (74) Representative: Eisenführ Speiser  Patentanwälte Rechtsanwälte PartGmbB Postfach 10 60 78 28060 Bremen 28060 Bremen (DE)