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EP 4 399 364 A1

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(43) Date of publication: 17.07.2024 Bulletin 2024/29 (21) Application number: 22799968.7 (22) Date of filing: 07.09.2022

(51) International Patent Classification (IPC):  D21C 9/00(2006.01) D21B 1/34(2006.01) B01F 27/00(2022.01) D21H 11/18(2006.01) (52) Cooperative Patent Classification (CPC): D21H 11/18; D21C 9/007; D21C 9/002; D21B 1/34; B01F 33/821; B01F 27/411; B01F 27/27; B01F 27/40; B01F 27/90 (86) International application number: PCT/IB2022/000500 (87) International publication number: WO 2023/037161 (16.03.2023 Gazette 2023/11)

(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: 08.09.2021 US 202163241700 P (71) Applicant: FiberLean Technologies Limited Par, Cornwall PL24 2SQ (GB)

(72) Inventors: BONDS, Chris Austell, Cornwall, PL25 3TL (GB) DU TOIT, Stephan Austell, Cornwall, PL26 6DW (GB) BULSON, Ben Austell, Cornwall, PL26 8PE (GB) TELLIER, Guillaume 1060 Saint Gilles (BE) WINDEBANK, Mark Bodmin, Cornwall, PL31 2UW (GB) SKUSE, David Truro, Cornwall, TR1 1BH (GB) (74) Representative: Russell, Tim et al Venner Shipley LLP 200 Aldersgate London EC1A 4HD London EC1A 4HD (GB)