(19)

(11)

EP 3 870 557 A1

(12)

(43) Date of publication: 01.09.2021 Bulletin 2021/35 (21) Application number: 19876911.9 (22) Date of filing: 25.10.2019

(51) International Patent Classification (IPC):  C06B 47/00(2006.01) (86) International application number: PCT/SE2019/051050 (87) International publication number: WO 2020/085986 (30.04.2020 Gazette 2020/18)

(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: 25.10.2018 AU 2018904060 (71) Applicant: Ab Etken Teknologi 123 63 Farsta (SE)	(72) Inventor: ARAOS, Miguel Queensland 4074 (AU) (74) Representative: Kransell & Wennborg KB  P.O. Box 27834 115 93 Stockholm 115 93 Stockholm (SE)