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EP 4 798 786 A1

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(43) Date of publication: 02.09.2026 Bulletin 2026/36 (21) Application number: 24808727.2 (22) Date of filing: 25.10.2024

(51) International Patent Classification (IPC):  D21H 19/34(2006.01) D21H 27/00(2006.01) D21H 21/16(2006.01) D21H 27/02(2006.01) (52) Cooperative Patent Classification (CPC): D21H 27/00; D21H 27/02; D21H 19/34; D21H 21/16 (86) International application number: PCT/IB2024/060518 (87) International publication number: WO 2025/088563 (01.05.2025 Gazette 2025/18)

(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA Designated Validation States: GE KH MA MD TN (30) Priority: 27.10.2023 PT 2023119010 (71) Applicant: Ass Almascience Investigacao Desenvolvimento Em Celulose Para Aplicacoes Inteligentes E Sustentaveis 2825-182 Caparica (PT)

(72) Inventors: HENRIQUES GASPAR, Cristina 2800-032 Almada (PT) MIGUEL SANTOS SILVA FREIRE, Tomás 2675-549 Arroja (PT) SOFIA BRIGIDA MATIAS, Mariana 6200-006 Covilhã (PT) MIGUEL NUNES PEREIRA, Luís 2820-095 Charneca Da Caparica (PT) (74) Representative: Neves, Ana  Inventa Parque das Nações Alameda dos Oceanos, 41, K21 1990-207 Lisboa 1990-207 Lisboa (PT)