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(11)

EP 4 090 780 A1

(12)

(43) Date of publication: 23.11.2022 Bulletin 2022/47 (21) Application number: 20853573.2 (22) Date of filing: 22.12.2020

(51) International Patent Classification (IPC):  C21D 8/00(2006.01) C22C 38/12(2006.01) C22C 38/06(2006.01) C22C 38/14(2006.01) C21D 6/02(2006.01) C22C 38/04(2006.01) C22C 38/00(2006.01) C22C 38/16(2006.01) C21D 6/00(2006.01) (52) Cooperative Patent Classification (CPC): C21D 8/005; C22C 38/04; C22C 38/12; C22C 38/002; C22C 38/06; C21D 2211/005; C21D 2211/008; C22C 38/16; C22C 38/14; C22C 38/001; C21D 6/005; C21D 6/02 (86) International application number: PCT/IB2020/062318 (87) International publication number: WO 2021/144643 (22.07.2021 Gazette 2021/29)

(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: 17.01.2020 PL 43259920 (71) Applicant: CMC POLAND SP.Z O.O. 42-400 Zawiercie (PL)	(72) Inventor: KUTYLA, Zbigniew deceased (PL) (74) Representative: Godlewski, Piotr  JWP Rzecznicy Patentowi Dorota Rzazewska sp.k. Sienna Center ul. Zelazna 28/30 00-833 Warszawa 00-833 Warszawa (PL)