(19)
(11) EP 4 565 657 A1

(12)

(43) Date of publication:
11.06.2025 Bulletin 2025/24

(21) Application number: 23777455.9

(22) Date of filing: 29.08.2023
(51) International Patent Classification (IPC): 
C09D 5/00(2006.01)
C23C 10/00(2006.01)
 C23C 4/00(2016.01)
(52) Cooperative Patent Classification (CPC):
C09D 5/00; C23C 28/04; C23C 28/042
(86) International application number:
PCT/US2023/073032
(87) International publication number:
WO 2024/050322 (07.03.2024 Gazette 2024/10)
(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: 30.08.2022 US 202263402129 P
28.08.2023 US 202318456860

(71) Applicant: Praxair S.T. Technology, Inc.
North Haven, CT 06473 (US)

(72) Inventors:
  • TANG, Zhihong
    Carmel, IN 46032 (US)
  • COPELAND, Daryl, G.
    Indianapolis, IN 46222 (US)
  • PERPALL, Mark, W.
    Indianapolis, IN 46220 (US)

(74) Representative: Schwan Schorer & Partner mbB 
Patentanwälte Bauerstraße 22
80796 München
80796 München (DE)

   


(54) CHROMATE-FREE AND PHOSPHATE-FREE CERAMIC COATING COMPOSITIONS FOR HOT CORROSION PROTECTION OF SUBSTRATES