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(11)

EP 4 259 594 A1

(12)

(43) Date of publication: 18.10.2023 Bulletin 2023/42 (21) Application number: 21806990.4 (22) Date of filing: 26.10.2021

(51) International Patent Classification (IPC):  C04B 28/02(2006.01) C04B 28/00(2006.01) C04B 111/00(2006.01) C04B 28/26(2006.01) C04B 12/00(2006.01) (52) Cooperative Patent Classification (CPC): C04B 28/02; C04B 28/26; C04B 28/006; C04B 12/005; C04B 2111/00732; Y02P 40/10; Y02W 30/91   C-Sets: C04B 28/02, C04B 12/04, C04B 14/043, C04B 14/045, C04B 14/06, C04B 14/106, C04B 18/08, C04B 18/141, C04B 18/146, C04B 22/143; C04B 28/26, C04B 7/02, C04B 14/043, C04B 14/06, C04B 14/106, C04B 18/08, C04B 18/141, C04B 18/146, C04B 22/143; C04B 28/006, C04B 14/043, C04B 14/06, C04B 14/106, C04B 18/08, C04B 18/141, C04B 18/146, C04B 22/143; (86) International application number: PCT/EP2021/079743 (87) International publication number: WO 2022/090272 (05.05.2022 Gazette 2022/18)

(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 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: 26.10.2020 GB 202016950 (71) Applicant: Soil Science Limited Bracknell Berkshire RG12 1WA (GB)	(72) Inventor: HINGE, William Berkshire RG12 1WA (GB) (74) Representative: White, Nicholas John  Tangible IP Ltd. Blake House 18 Blake Street York, North Yorkshire YO1 8QG York, North Yorkshire YO1 8QG (GB)