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(11)

EP 3 973 107 A1

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(43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 20809436.7 (22) Date of filing: 22.05.2020

(51) International Patent Classification (IPC):  E02D 5/16(2006.01) (52) Cooperative Patent Classification (CPC): E02D 7/22; E02D 5/34 (86) International application number: PCT/US2020/034122 (87) International publication number: WO 2020/237113 (26.11.2020 Gazette 2020/48)

(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: 22.05.2019 US 201962851586 P 16.10.2019 US 201962915729 P 23.02.2020 US 202062980352 P 23.02.2020 US 202062980371 P (71) Applicant: Stroyer, Benjamin, G. East Rochester NY 14445 (US)

(72) Inventor: Stroyer, Benjamin, G. East Rochester NY 14445 (US) (74) Representative: Pallini Gervasi, Diego  Notarbartolo & Gervasi GmbH Bavariaring 21 80336 Munich 80336 Munich (DE)