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EP 4 284 562 A1

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(43) Date of publication: 06.12.2023 Bulletin 2023/49 (21) Application number: 21912352.8 (22) Date of filing: 02.01.2021

(51) International Patent Classification (IPC):  B03B 9/06(2006.01) B09B 3/00(2022.01) B03B 7/00(2006.01) (52) Cooperative Patent Classification (CPC): B03B 7/00; B03B 9/06; B09B 2101/25; B09B 3/38 (86) International application number: PCT/BG2021/000001 (87) International publication number: WO 2022/140821 (07.07.2022 Gazette 2022/27)

(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 (71) Applicant: Melik-Pashaev, Ovanes Nersesovich 1612 Sofia (BG)

(72) Inventors: STOYANOV, Krasimir Krumov 1408 Sofia (BG) STOYANOV, Martin Krasimirov 1408 Sofia (BG) STEFANOVA-STOYANOVA, Varbinka Vasileva 1408 Sofia (BG) DERSARKISYAN, Toms Hrant 1618 Sofia (BG) MITEV, Koycho Georgiev 7020 Russe (BG) KAMENSHTIK, Oleg 1330 Sofia (BG) MILOSHEV, Kiril Nilolov 1408 Sofia (BG) (74) Representative: Neykov, Neyko Hristov  NIKOPATENT S.A. 58, Vorino Street App. 2 1680 Sofia 1680 Sofia (BG)