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(11)

EP 4 423 312 A1

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(43) Date of publication: 04.09.2024 Bulletin 2024/36 (21) Application number: 22830339.2 (22) Date of filing: 27.10.2022

(51) International Patent Classification (IPC):  C23C 22/56(2006.01) C23F 11/18(2006.01) C23F 11/08(2006.01) C09D 5/08(2006.01) (52) Cooperative Patent Classification (CPC): C23C 22/56; C23C 2222/10; C09D 5/084 (86) International application number: PCT/US2022/078770 (87) International publication number: WO 2023/076990 (04.05.2023 Gazette 2023/18)

(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: 27.10.2021 US 202163272554 P 24.03.2022 US 202263269866 P (71) Applicant: PRC-Desoto International, Inc. Sylmar, California 91342 (US)	(72) Inventors: CHARI, Krishnan Ventura, California 93004 (US) MORRIS, Eric Leon Murrieta, California 92563 (US) (74) Representative: f & e patent  Braunsberger Feld 29 51429 Bergisch Gladbach 51429 Bergisch Gladbach (DE)