(19)

(11)

EP 4 143 498 A2

(12)

(88) Date of publication A3: 04.11.2021 (43) Date of publication: 08.03.2023 Bulletin 2023/10 (21) Application number: 21731381.6 (22) Date of filing: 26.04.2021

(51) International Patent Classification (IPC):  F42B 12/20(2006.01) F42C 19/08(2006.01) F42B 12/22(2006.01) (52) Cooperative Patent Classification (CPC): F42B 12/22; F42B 12/207; F42C 19/0807; F42C 19/0815; F42C 19/0838 (86) International application number: PCT/BG2021/000014 (87) International publication number: WO 2021/217222 (04.11.2021 Gazette 2021/44)

(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: 27.04.2020 BG 11312520 (71) Applicant: TRANSARMORY Ltd 1517 Sofia (BG)	(72) Inventors: PETKOV, Stancho Petkov 4330 Sopot (BG) IVANOV, Dobrin Ivanov 1408 Sofia (BG) (74) Representative: Neykov, Neyko Hristov  NIKOPATENT S.A. 58, Vorino Street App. 2 1680 Sofia 1680 Sofia (BG)