(19)

(11)

EP 3 973 265 A2

(12)

(88) Date of publication A3: 11.03.2021 (43) Date of publication: 30.03.2022 Bulletin 2022/13 (21) Application number: 20840932.6 (22) Date of filing: 13.07.2020

(51) International Patent Classification (IPC):  G01N 1/20(2006.01) G01N 21/01(2006.01) G01N 21/85(2006.01) G01N 1/10(2006.01) (52) Cooperative Patent Classification (CPC): G01N 35/1097; G01N 2001/205; G01N 1/2035; G01N 2001/388; G01N 1/38 (86) International application number: PCT/US2020/041834 (87) International publication number: WO 2021/011489 (21.01.2021 Gazette 2021/03)

(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: 12.07.2019 US 201962873498 P 11.05.2020 US 202016871895 (71) Applicant: CUSTOMS SENSORS & TECHNOLOGY Fenton, MO 63026 (US)	(72) Inventors: NORDMAN, Richard St. Charles, MO 63301 (US) PONSTINGL, Michael Sunset Hills, MO 63028 (US) (74) Representative: Casbon, Paul Richard  Lucas & Co 135 Westhall Road Warlingham, Surrey CR6 9HJ Warlingham, Surrey CR6 9HJ (GB)