(19)

(11)

EP 4 251 791 A1

(12)

(43) Date of publication: 04.10.2023 Bulletin 2023/40 (21) Application number: 21895995.5 (22) Date of filing: 23.11.2021

(51) International Patent Classification (IPC):  C25C 7/06(2006.01) C25C 3/18(2006.01) (52) Cooperative Patent Classification (CPC): C25C 7/06; C25C 3/18; C25C 7/005; C25C 7/007; C25C 7/025; C25B 1/01; C25B 9/30; C25B 15/04; C25B 11/02; C25C 3/34 (86) International application number: PCT/CA2021/051665 (87) International publication number: WO 2022/109725 (02.06.2022 Gazette 2022/22)

(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: 24.11.2020 US 202063117483 P (71) Applicant: Elysis Limited Partnership Montreal, QC H3B 3M5 (CA)	(72) Inventors: D'ASTOLFO, Leroy Burrell, Pennsylvania 15068 (US) LIU, Xinghua Murrysville, Pennsylvania 15668 (US) MICKELSON, Larry Queen Creek, Arizona 85142 (US) MACKEY, Allen George Jeannette, Pennsylvania 15644 (US) FORS, John N4625 Flekkeroey (NO) (74) Representative: Cabinet Beau de Loménie  158, rue de l'Université 75340 Paris Cedex 07 75340 Paris Cedex 07 (FR)