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(11)

EP 3 894 482 A1

(12)

(43) Date of publication: 20.10.2021 Bulletin 2021/42 (21) Application number: 19832852.8 (22) Date of filing: 11.12.2019

(51) International Patent Classification (IPC):  C09B 23/04(2006.01) G01N 21/64(2006.01) C09B 55/00(2006.01) G01N 33/533(2006.01) (52) Cooperative Patent Classification (CPC): G01N 33/582; G01N 33/533; C09B 23/04; C09B 55/004; G01N 21/64 (86) International application number: PCT/EP2019/084763 (87) International publication number: WO 2020/120636 (18.06.2020 Gazette 2020/25)

(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 (30) Priority: 14.12.2018 DE 102018132305 (71) Applicant: Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen 52056 Aachen (DE)	(72) Inventors: BANALA, Srinivas 52064 Aachen (DE) KIESSLING, Fabian 52066 Aachen (DE) RUEPING, Magnus 52074 Aachen (DE) MERKES, Jean Michel 52511 Geilenkirchen (DE) (74) Representative: Michalski Hüttermann & Partner Patentanwälte mbB  Speditionstraße 21 40221 Düsseldorf 40221 Düsseldorf (DE)