(19)

(11)

EP 4 142 966 A1

(12)

(43) Date of publication: 08.03.2023 Bulletin 2023/10 (21) Application number: 21721536.7 (22) Date of filing: 28.04.2021

(51) International Patent Classification (IPC):  B22F 3/00(2006.01) B33Y 70/10(2020.01) B22F 1/00(2006.01) B33Y 30/00(2015.01) B22F 10/00(2021.01) (52) Cooperative Patent Classification (CPC): B22F 2998/10; B33Y 70/10; B33Y 30/00; C04B 2235/6026; B22F 10/00; C04B 35/634; C04B 35/63424; C04B 35/632; C04B 35/00; C04B 35/01; C04B 35/18; C04B 35/447; C04B 35/495; C04B 35/56; C04B 35/52; C04B 35/547; C04B 2235/442; C04B 2235/443; C04B 2235/448; C04B 2235/3409; C04B 2235/3239; C04B 2235/3256; C04B 2235/405; Y02P 10/25; B22F 1/103   C-Sets: B22F 2998/10, B22F 1/103, B22F 3/1025, B22F 2003/241, B22F 10/00; (86) International application number: PCT/EP2021/061108 (87) International publication number: WO 2021/219705 (04.11.2021 Gazette 2021/44)

(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: 28.04.2020 EP 20305409 (71) Applicant: Nanoe 91160 Ballainvilliers (FR)	(72) Inventors: BOUCHET-DOUMENQ, Guillaume 91170 Viry-Châtillon (FR) FAYE, Romain 93260 Les lilas (FR) (74) Representative: Icosa  83 avenue Denfert-Rochereau 75014 Paris 75014 Paris (FR)