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(11)

EP 3 768 869 A1

(12)

(43) Date of publication: 27.01.2021 Bulletin 2021/04 (21) Application number: 19726139.9 (22) Date of filing: 20.03.2019

(51) International Patent Classification (IPC):  C22B 1/00(2006.01) C22B 3/06(2006.01) C22B 7/00(2006.01) C22B 3/02(2006.01) C22B 3/44(2006.01) C22B 25/06(2006.01) (86) International application number: PCT/IB2019/052273 (87) International publication number: WO 2019/180642 (26.09.2019 Gazette 2019/39)

(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: 20.03.2018 PL 42495918 (71) Applicants: Uniwersytet Warszawski 00-927 Warszawa (PL) Greenmet Technology Sp. z o. o. 96-321 Zelechow (PL)	(72) Inventors: HYK, Wojciech 00-842 Warszawa (PL) KITKA, Konrad 22-470 Zwierzyniec nad Wieprzem (PL) RUDNICKI, Dariusz 96-321 Zelechow (PL) (74) Representative: Zebrowska-Kucharzyk, Agnieszka Elzbieta  Patpol Kancelaria Patentowa Sp. z o.o. ul. Nowoursynowska 162 J 02-776 Warszawa 02-776 Warszawa (PL)