(19)

(11)

EP 3 867 419 A1

(12)

(43) Date of publication: 25.08.2021 Bulletin 2021/34 (21) Application number: 19786824.3 (22) Date of filing: 18.10.2019

(51) International Patent Classification (IPC):  C23C 18/12(2006.01) C30B 7/10(2006.01) C30B 29/16(2006.01) C04B 41/00(2006.01) E04F 13/00(2006.01) (86) International application number: PCT/EP2019/078465 (87) International publication number: WO 2020/079273 (23.04.2020 Gazette 2020/17)

(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: 19.10.2018 EP 18306376 (71) Applicants: Universite Gustave Eiffel 77420 Champs-sur-Marne (FR) Université Gustave Eiffel 77420 Champs-Sur-Marne (FR)	(72) Inventors: POUPART, Romain 94000 CRETEIL (FR) LEPRINCE, Yamin 77164 FERRIERES EN BRIE (FR) GNAMBODOE-CAPOCHICHI, Martine 77420 Champs Sur Marne (FR) (74) Representative: A.P.I. Conseil  Immeuble Newton 4, rue Jules Ferry 64000 Pau 64000 Pau (FR)