(19)

(11)

EP 4 078 171 A1

(12)

(43) Date of publication: 26.10.2022 Bulletin 2022/43 (21) Application number: 19914204.3 (22) Date of filing: 16.12.2019

(51) International Patent Classification (IPC):  G01N 33/00(2006.01) (52) Cooperative Patent Classification (CPC): G01N 33/0014 (86) International application number: PCT/IB2019/001474 (87) International publication number: WO 2021/123864 (24.06.2021 Gazette 2021/25)

(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 (71) Applicant: Aeroqual Ltd. Auckland, 1026 (NZ)	(72) Inventor: HENSHAW, Geoffrey, Stephen Auckland (NZ) (74) Representative: Atkinson & Company Intellectual Property Limited  7 Moorgate Road Rotherham S60 2BF Rotherham S60 2BF (GB)