(19)

(11)

EP 4 356 059 A1

(12)

(43) Date of publication: 24.04.2024 Bulletin 2024/17 (21) Application number: 21758176.8 (22) Date of filing: 04.08.2021

(51) International Patent Classification (IPC):  F28D 11/00(2006.01) F28F 5/00(2006.01) F28D 21/00(2006.01) (52) Cooperative Patent Classification (CPC): F28D 21/0015; F28F 2255/02; F28F 5/00; F28D 11/00; F28F 2280/10 (86) International application number: PCT/PL2021/000052 (87) International publication number: WO 2022/265525 (22.12.2022 Gazette 2022/51)

(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: 19.06.2021 PL 43820821 (71) Applicant: Wisniewski, Jaroslaw 05-090 Raszyn (PL)	(72) Inventor: Wisniewski, Jaroslaw 05-090 Raszyn (PL) (74) Representative: Dziubinska, Joanna  Kancelaria Patentowa ul. Wyszynskiego 58 m 25 94-047 Lodz 94-047 Lodz (PL)