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(11)

EP 4 815 898 A1

(12)

(43) Date of publication: 07.10.2026 Bulletin 2026/41 (21) Application number: 24827480.5 (22) Date of filing: 26.11.2024

(51) International Patent Classification (IPC):  A61K 6/00(2020.01) C08G 18/48(2006.01) C08G 18/75(2006.01) B33Y 70/00(2020.01) C08G 18/67(2006.01) C08L 75/16(2006.01) (52) Cooperative Patent Classification (CPC): B33Y 70/00; C08G 18/755; C08G 18/4858; C08G 18/672; C08L 75/16; A61C 7/08; B33Y 80/00; B33Y 10/00; B29C 64/124; B29C 64/295   C-Sets: C08G 18/672, C08G 18/48; (86) International application number: PCT/US2024/057435 (87) International publication number: WO 2025/117528 (05.06.2025 Gazette 2025/23)

(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: 30.11.2023 US 202363604622 P (71) Applicant: Align Technology, Inc. San Jose, CA 95134 (US)	(72) Inventors: CHEN, Liang San Jose, California 95134 (US) CHOUDHARY, Umesh Upendra San Jose, California 95134 (US) (74) Representative: Carpmaels & Ransford LLP  One Southampton Row London WC1B 5HA London WC1B 5HA (GB)