(19)
(11) EP 4 453 289 A1

(12)

(43) Date of publication:
30.10.2024 Bulletin 2024/44

(21) Application number: 22822348.3

(22) Date of filing: 24.11.2022
(51) International Patent Classification (IPC): 
C25D 11/18(2006.01)
B22F 1/052(2022.01)
B22F 1/07(2022.01)
B22F 1/142(2022.01)
 C25D 11/04(2006.01)
B22F 1/06(2022.01)
B22F 1/065(2022.01)
B22F 1/12(2022.01)
(52) Cooperative Patent Classification (CPC):
C25D 11/04; C25D 11/18; B22F 1/052; B22F 1/06; B22F 1/12; B22F 1/07; B22F 1/142; B22F 1/065; B22F 2999/00; C25F 3/24; C01F 7/42; C01F 7/57; C01P 2004/51; C01P 2004/61; C01P 2004/62; C01P 2004/64; C01P 2002/72; C01P 2004/03; C01P 2004/04; C01P 2006/16; C01P 2004/80; C01P 2004/32; C01P 2004/10
 
C-Sets:
B22F 2999/00, B22F 1/052, B22F 2202/13;
(86) International application number:
PCT/EP2022/083105
(87) International publication number:
WO 2023/117289 (29.06.2023 Gazette 2023/26)
(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 ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
KH MA MD TN

(30) Priority: 23.12.2021 DE 102021134542

(71) Applicant: TDK Electronics AG
81671 München (DE)

(72) Inventors:
  • BACCO, Cristiano
    20096 Pioltello - Milano (IT)
  • KÜZECI, Erkan
    27010 Ceranovia - Pavia (IT)

(74) Representative: Epping - Hermann - Fischer 
Patentanwaltsgesellschaft mbH Schloßschmidstraße 5
80639 München
80639 München (DE)

   


(54) ALUMINA PARTICLES, PROCESS OF FORMING HIGH PURITY ALUMINUM OR ALUMINA PARTICLES, AND USE OF A FOIL AS A RAW MATERIAL