(19)
(11) EP 3 927 474 A1

(12)

(43) Date of publication:
29.12.2021 Bulletin 2021/52

(21) Application number: 20716982.2

(22) Date of filing: 21.02.2020
(51) International Patent Classification (IPC): 
B08B 1/00(2006.01)
B21B 45/04(2006.01)
C23C 22/00(2006.01)
C23C 22/36(2006.01)
 B08B 1/04(2006.01)
B24B 1/00(2006.01)
C23C 22/22(2006.01)
(52) Cooperative Patent Classification (CPC):
C21D 6/002; B21B 3/02; C21D 9/00; B21B 45/04; C23C 18/1216; C23C 18/08; C21D 6/004; C21D 9/52
(86) International application number:
PCT/US2020/019266
(87) International publication number:
WO 2020/172554 (27.08.2020 Gazette 2020/35)
(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: 21.02.2019 US 201962808399 P

(71) Applicant: Cleveland-Cliffs Steel Properties Inc.
West Chester, OH 45069 (US)

(72) Inventors:
  • PRICE, Leroy, R.
    Hilton Head, SC 29926 (US)
  • MYERS, Frederick, A.
    Middletown, OH 45042 (US)

(74) Representative: Samson & Partner Patentanwälte mbB 
Widenmayerstraße 6
80538 München
80538 München (DE)

   


(54) REDUCTION AND REMOVAL OF PROCESS OXIDES ON STAINLESS STEEL