(19)

(11)

EP 3 938 576 A1

(12)

(43) Date of publication: 19.01.2022 Bulletin 2022/03 (21) Application number: 20709229.7 (22) Date of filing: 12.03.2020

(51) International Patent Classification (IPC):  D21J 7/00(2006.01) (52) Cooperative Patent Classification (CPC): D21J 7/00 (86) International application number: PCT/EP2020/056715 (87) International publication number: WO 2020/182961 (17.09.2020 Gazette 2020/38)

(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: 14.03.2019 IN 201911010049 10.05.2019 EP 19173703 (71) Applicant: Danmarks Tekniske Universitet 2800 Kongens Lyngby (DK)	(72) Inventors: SAXENA, Prateek Jaipur, Rajasthan 302015 (IN) BISSACCO, Giuliano 25354 Mörarp (SE) (74) Representative: Guardian IP Consulting I/S  Diplomvej, Building 381 2800 Kgs. Lyngby 2800 Kgs. Lyngby (DK)