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EP 3 966 354 A1

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(43) Date of publication: 16.03.2022 Bulletin 2022/11 (21) Application number: 19730566.7 (22) Date of filing: 10.05.2019

(51) International Patent Classification (IPC):  C21D 1/20(2006.01) C21D 8/00(2006.01) C22C 38/04(2006.01) C22C 38/44(2006.01) C22C 38/52(2006.01) C21D 1/25(2006.01) C22C 38/02(2006.01) C22C 38/42(2006.01) C22C 38/46(2006.01) (52) Cooperative Patent Classification (CPC): C22C 38/42; C22C 38/44; C22C 38/46; C22C 38/52; C22C 38/04; C22C 38/02; C21D 2211/002; C21D 1/20; C21D 1/25; C21D 8/005 (86) International application number: PCT/SI2019/050008 (87) International publication number: WO 2020/231346 (19.11.2020 Gazette 2020/47)

(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: Sij Metal Ravne D.D. 2390 Ravne na Koroskem (SI)	(72) Inventors: KIRBIS, Peter 2242 Zgornja Korena (SI) VRECIC, Andrej 2391 Prevalje (SI) VECKO PIRTOVSEK, Tatjana 2380 Slovenj Gradec (SI) URNAUT, Borut 2394 Kotlje (SI) (74) Representative: Jersan, Tatjana  ITEM d.o.o. Patent and Trademark Agency Resljeva cesta 16 1000 Ljubljana 1000 Ljubljana (SI)