(19)

(11)

EP 3 941 889 A1

(12)

(43) Date of publication: 26.01.2022 Bulletin 2022/04 (21) Application number: 20724918.6 (22) Date of filing: 30.04.2020

(51) International Patent Classification (IPC):  C04B 35/628(2006.01) B32B 18/00(2006.01) C04B 35/645(2006.01) C04B 35/82(2006.01) C04B 35/52(2006.01) C04B 35/80(2006.01) (52) Cooperative Patent Classification (CPC): C04B 2235/5244; C04B 2237/363; C04B 2235/96; C04B 2235/616; C04B 2235/5256; C04B 2235/5224; C04B 2235/5228; C04B 2235/666; C04B 2237/343; C04B 2235/524; C04B 2235/5236; C04B 2235/5232; C04B 35/82; C04B 35/62868; C04B 2237/38; C04B 2235/5292; B32B 18/00; C04B 2235/6567; C04B 35/62884; C04B 35/80; C04B 35/645; C04B 35/62886; C04B 2235/522; C04B 2235/6565; C04B 35/62873; C04B 35/62892; C04B 35/522; C04B 35/62849; C04B 35/62857; C04B 2235/77; C04B 2235/5454; C04B 35/62897 (86) International application number: PCT/GB2020/051062 (87) International publication number: WO 2020/222013 (05.11.2020 Gazette 2020/45)

(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: 01.05.2019 GB 201906105 (71) Applicant: Adelan Limited Birmingham B17 9HD (GB)	(72) Inventor: KENDALL, Kevin Shropshire TF9 4PY (GB) (74) Representative: Barker Brettell LLP  100 Hagley Road Edgbaston Birmingham B16 8QQ Birmingham B16 8QQ (GB)