(19)

(11)

EP 3 840 614 A1

(12)

(43) Date of publication: 30.06.2021 Bulletin 2021/26 (21) Application number: 19755625.1 (22) Date of filing: 16.08.2019

(51) International Patent Classification (IPC):  A47F 3/04(2006.01) F25D 23/02(2006.01) A47F 5/00(2006.01) (86) International application number: PCT/EP2019/072014 (87) International publication number: WO 2020/038840 (27.02.2020 Gazette 2020/09)

(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: 20.08.2018 GB 201813547 (71) Applicant: Wirth Research Limited Bicester, Oxfordshire OX26 4LD (GB)	(72) Inventor: WIRTH, Nicholas Whittlebury Northamptonshire NN12 8TF (GB) (74) Representative: Haseltine Lake Kempner LLP  Redcliff Quay 120 Redcliff Street Bristol BS1 6HU Bristol BS1 6HU (GB)