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(11)

EP 3 580 363 A1

(12)

(43) Date of publication: 18.12.2019 Bulletin 2019/51 (21) Application number: 17844577.1 (22) Date of filing: 08.12.2017

(51) International Patent Classification (IPC):  C22B 13/02(2006.01) C01B 33/12(2006.01) H01M 10/54(2006.01) (86) International application number: PCT/BG2017/000030 (87) International publication number: WO 2018/145172 (16.08.2018 Gazette 2018/33)

(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: MA MD TN (30) Priority: 08.02.2017 BG 11245517 (71) Applicant: Astech 2015 Ltd 1606 Sofia (BG)	(72) Inventors: ZHEKOV, Serzho Simeonov 7000 Ruse (BG) SLAVOV, Simeon Kostadinov 9010 Varna (BG) BOBOKOV, Atanas Stoilov 1415 Sofia (BG) BOBOKOV, Plamen Stoilov 7000 Ruse (BG) BOGDANOV, Vasil Tsvetkov 3400 Montana (BG) (74) Representative: Yanakieva-Zlatareva, Maria Nikolova  zh.k. Dianabad B. 31B, vh. B, ap. 14 1172 Sofia 1172 Sofia (BG)