(19)

(11)

EP 4 430 006 A1

(12)

(43) Date of publication: 18.09.2024 Bulletin 2024/38 (21) Application number: 22803363.5 (22) Date of filing: 09.11.2022

(51) International Patent Classification (IPC):  C03C 3/064(2006.01) C03C 3/091(2006.01) C03C 1/00(2006.01) C03C 3/089(2006.01) C03C 12/00(2006.01) C04B 35/00(2006.01) (52) Cooperative Patent Classification (CPC): C03C 3/064; C03C 3/089; C03C 3/091; C03C 12/00; C03C 1/006; C03C 2214/16; C01B 33/20; C01B 37/007 (86) International application number: PCT/GB2022/052829 (87) International publication number: WO 2023/084203 (19.05.2023 Gazette 2023/20)

(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: KH MA MD TN (30) Priority: 10.11.2021 GB 202116159 (71) Applicant: Pilkington Group Limited Lathom Nr. Ormskirk Lancashire L40 5UF (GB)	(72) Inventors: VARMA, Karikath Sukumar Southport, Merseyside PR8 2BE (GB) BLACK, Fiona Ormskirk, Lancashire L40 5UF (GB) UDDIN, Ruksana Ormskirk, Lancashire L40 5UF (GB) (74) Representative: Hope, Adam John et al Pilkington Technology Management Limited European Technical Centre Hall Lane Lathom Ormskirk, Lancashire L40 5UF Ormskirk, Lancashire L40 5UF (GB)