(19)

(11)

EP 3 631 026 A1

(12)

(43) Date of publication: 08.04.2020 Bulletin 2020/15 (21) Application number: 18729175.2 (22) Date of filing: 25.05.2018

(51) International Patent Classification (IPC):  C22B 3/44(2006.01) (86) International application number: PCT/FI2018/050399 (87) International publication number: WO 2018/215697 (29.11.2018 Gazette 2018/48)

(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: 26.05.2017 FI 20175473 (71) Applicant: Skyscape Oy 02330 Espoo (FI)	(72) Inventors: KUNNILA, Jari 02330 Espoo (FI) ILVES, Lasse 02330 Espoo (FI) (74) Representative: Laine IP Oy  Porkkalankatu 24 00180 Helsinki 00180 Helsinki (FI)